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barefootjohnny Samba Member
Joined: July 08, 2017 Posts: 62 Location: Kansas
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Posted: Sun Feb 11, 2018 11:02 am Post subject: Switch power source |
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When wiring up an aftermarket cd player to a 1977 baywindow where do I attach the red wire (Switch power source) so that the head unit doesn't drain my secondary battery?
My bus doesn't have the cig lighter so I cant wire it there and when I wired it up on what I thought was the correct fuse spot, it still drained the battery.
Suggestions?
Thank you _________________ 1977 VW Baywindow |
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51153 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Sun Feb 11, 2018 1:11 pm Post subject: Re: Switch power source |
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Isn't the whole idea to have it feed from the secondary battery so you can still start the bus after a hard days listening? _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50352
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Posted: Sun Feb 11, 2018 2:15 pm Post subject: Re: Switch power source |
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I added a rocker switch to the dash for this use, it has an LED light to let me know when it is on.
Alternately if you don't mind leaving your key in the ignition you can use the "key in" buzzer circuit, it is a gray/black wire in your steer column wiring harness.
Last edited by Wildthings on Sun Feb 11, 2018 4:31 pm; edited 1 time in total |
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barefootjohnny Samba Member
Joined: July 08, 2017 Posts: 62 Location: Kansas
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Posted: Sun Feb 11, 2018 4:07 pm Post subject: Re: Switch power source |
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busdaddy wrote: |
Isn't the whole idea to have it feed from the secondary battery so you can still start the bus after a hard days listening? |
My secondary batteries are not hooked up to starter battery. I run 200w solar panel to my secondary batteries. I don't want them constantly low due to head unit.
Gonna look into rocker switch _________________ 1977 VW Baywindow |
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barefootjohnny Samba Member
Joined: July 08, 2017 Posts: 62 Location: Kansas
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Posted: Sun Feb 11, 2018 4:12 pm Post subject: Re: Switch power source |
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Wildthings wrote: |
I added a rocker switch to the dash for this use, it has an LED light to let me know when it is on. If you don't ming leaving your key in the ignition you can use the seat belt buzzer circuit, I think it is a gray wire, but check your wiring diagram. |
Did you have to attach the rocker switch to a wire in steering column? if so which one? _________________ 1977 VW Baywindow |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50352
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Posted: Sun Feb 11, 2018 4:29 pm Post subject: Re: Switch power source |
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barefootjohnny wrote: |
Wildthings wrote: |
I added a rocker switch to the dash for this use, it has an LED light to let me know when it is on. If you don't mind leaving your key in the ignition you can use the seat belt buzzer circuit, I think it is a gray wire, but check your wiring diagram. |
Did you have to attach the rocker switch to a wire in steering column? if so which one? |
The rocker switch is just tee'd off of the fuse protected always hot wire that feeds the stereo, no key is required. This is a different setup than using the "key in" buzzer wire. |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Sun Feb 11, 2018 5:21 pm Post subject: Re: Switch power source |
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Quote: |
When wiring up an aftermarket cd player to a 1977 bay window where do I attach the red wire (Switch power source) so that the head unit doesn't drain my secondary battery?
My bus doesn't have the cig lighter so I can't wire it there and when I wired it up on what I thought was the correct fuse spot, it still drained the battery. |
If it's draining the secondary battery, then you can't wire it up to any of the regular spots on the fuse block, as they're all fed by the primary battery. I assume you have a separate feeder coming from the secondary battery to all of the camper type accessories via its own fuse block?. The red and yellow power wires from the stereo must come from there.
I find it strange that there is a drainage problem with the stereo in the "off" position, but if so, (as said previously) put a switch in the red wire that you can switch off when it's not in use. See if that helps. The yellow wire must have full-time power to keep the clock and station memory viable. Eventually, even these functions will drain the battery over a period of weeks or months, so periodic charging will be required.
Q: how long does it take to drain the secondary battery?
A rocker switch is fine, but any style switch will do. An indicator light is a good idea so you don't forget that it's on. _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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barefootjohnny Samba Member
Joined: July 08, 2017 Posts: 62 Location: Kansas
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Posted: Sun Feb 11, 2018 5:42 pm Post subject: Re: Switch power source |
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I am upgrading my solar system to run 2 batteries in a series. But before the cd player would drain the battery within a couple days. Not a big deal, but since the cd player and other electronics will run off the batteries hooked to the solar, then I dont want to worry about maybe a cloudy week and the batteries getting drained. Think the switch will work just fine. Not to worried about losing stations or time. I bought a cd player that actually has no cd player and instead is more bluetooth oriented. _________________ 1977 VW Baywindow |
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rottenkid Samba Member
Joined: June 19, 2015 Posts: 236 Location: Warkworth, ontario
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Posted: Sun Feb 11, 2018 6:44 pm Post subject: Re: Switch power source |
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Vw buses are similar to my 66 van I had years ago. You need the vehicle running in order to use a radio. On that vehicle I added a switch, connected to a hot supply. When I wanted the radio to work without the vehicle running the the switch would be on. I think this is what your in need for your system. |
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69BahamaYellow Samba Member
Joined: April 22, 2011 Posts: 537 Location: Talbott, TN
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Posted: Mon Feb 12, 2018 8:49 am Post subject: Re: Switch power source |
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Only problem with toggle switches is you forget to turn them off. If your bus has a door buzzer circuit (that reminds you the key is still in the ignition when you open the door, then you can use that like an accessory switch for radios, etc. I did that with 1978, when we installed a retrosound radio (starting at the bottom of page 7 of this post.
Accessory switch you won't forget to turn off
Here's how you wire it up
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Jeff Geisen Samba Chaplain
Joined: December 21, 2004 Posts: 1883 Location: N.W. Georgia
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Posted: Mon Feb 12, 2018 3:58 pm Post subject: Re: Switch power source |
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The headlight switch is easy to get at, it has a full time power spade #50 I believe, and #30 is switched power. Remove the switch and plug on a spade splitter and choose your circuit. Remount the switch and viola, minimal hackery and it's already fused.
Above not intended for amplifier power supply. _________________ I Corinthians 4: 1 thru 5
‘63 ragtop - ‘68 single cab |
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airschooled Air-Schooled
Joined: April 04, 2012 Posts: 12728 Location: on a bike ride somewhere
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Posted: Mon Feb 12, 2018 5:12 pm Post subject: Re: Switch power source |
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Jeff Geisen wrote: |
spade splitter |
In case anyone reading hasn't seen one, they're a great way to add accessories without chopping up the factory wiring!
Robbie
_________________ Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Tue Feb 13, 2018 9:37 am Post subject: Re: Switch power source |
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If you have (or buy or or can borrow) an "F" terminal crimp tool, these are better (as in 'factory stock'):
Available online from DigiKey. About a quarter a pop.
(Sorry, Robbie...) _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST)
Last edited by telford dorr on Tue Feb 13, 2018 9:50 am; edited 3 times in total |
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airschooled Air-Schooled
Joined: April 04, 2012 Posts: 12728 Location: on a bike ride somewhere
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Posted: Tue Feb 13, 2018 9:40 am Post subject: Re: Switch power source |
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No apology needed- I’ve never seen the splitters with factory crimp style- thanks!
Robbie _________________ Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Tue Feb 13, 2018 9:47 am Post subject: Re: Switch power source |
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Yup. I've used a ton of them lately, adding a tach and other gauges to a Gary project. Makes it trivial. One note: if you add shrink tubing (always recommended), be sure to put it on the wire before crimping on the terminal - really hard afterwards.
Also, the p/n on the big 0.375" terminal has changed. Will update the gallery pic with the new number soon. _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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jakokombi Samba Member
Joined: August 15, 2010 Posts: 779 Location: Milwaukee
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Posted: Tue Feb 13, 2018 12:41 pm Post subject: Re: Switch power source |
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All of this talk of adding switches in the dash when there is a nice original one with a green light already there. I mean, the defroster doesn't work anyway, right? _________________ 70 Sunroof Kombi
85 Motherfukinvanagon
73 Thing
72 Baja |
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Globespotter Samba Member
Joined: February 16, 2012 Posts: 1770 Location: Newmarket, ON
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Terminatez Samba Member
Joined: June 07, 2015 Posts: 340 Location: Sun Valley, CA
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Posted: Tue Feb 13, 2018 7:24 pm Post subject: Re: Switch power source |
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telford dorr wrote: |
If you have (or buy or or can borrow) an "F" terminal crimp tool, these are better (as in 'factory stock'):
Available online from DigiKey. About a quarter a pop.
(Sorry, Robbie...) |
What the difference between the F type crimp tool to an open barrel type crimp tool?
https://www.amazon.com/Tool-Aid-SGT18600-Crimping-Barrel/dp/B00BQWO5RU
I tried searching arouund.. _________________ 1972 Westfalia P30 hardtop Campmobile [On-going Restoration]
aeromech wrote: |
I don't think I've ever seen an engine in worse shape. |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Tue Feb 13, 2018 8:23 pm Post subject: Re: Switch power source |
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It's the same thing. "F" type terminal is the official name of the VW terminal type. (Hold the terminal up so the wire holding fingers point to the right. You'll see the letter F).
One difference between the tool you posted and the Greenlee or Del City tool is that those tools are "controlled cycle" tools. They have a ratchet system and a stop, such that once the crimp cycle is started, it must be completed before the tool will open again. You can't under- or over-crimp the terminal. Also, these tools has more leverage than the simple manual type tool, making crimping large wires easier.
Your tool doesn't have those features, so it requires a little more skill (patience, really) to use it. Not a big deal if you're just an occasional user (and some times it's a benefit on odd wire sizes) . If you use it on a frequent basis, then the controlled cycle tool is worth the extra cost. _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST)
Last edited by telford dorr on Tue Feb 13, 2018 8:48 pm; edited 1 time in total |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Tue Feb 13, 2018 8:35 pm Post subject: Re: Switch power source |
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One note on the terminal shown below: this terminal is a high quality terminal. Note that the blue plastic insulator is pressed onto a piece of metal tubing, and this assembly is pressed onto the terminal body. This construction is far superior to the normal cheap FLAPS terminals which don't have the metal tube piece. These cheap FLAPS terminals are thin and will open up, releasing the force on the wire, allowing it to pull out. The terminals with the tubing have no seam, and can't open. Sometimes, instead of adding a piece of metal tubing, they will weld the seam to create a tube. Same effect.
This lack of a welded seam or tubing is what gives crimp terminals a bad reputation from wires pulling out.
Now this terminal doesn't have the insulation gripping properties of a factory terminal for strain relief, so I prefer the factory type. But if you do choose to use the terminal type shown, look for either a welded seam or the tubing when purchasing them (you may have to disassemble one to check it properly).
(Factory "F" terminals don't have this issue because of the complex fold the crimp tool puts in the terminal, which adds incredible strength to the crimp.) _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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