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Official lazy person's stupid question thread
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DuncanS
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PostPosted: Thu May 06, 2021 6:44 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

OK, so I'm wrong here. This can not possibly be a Wolfsburg wiring schedule. VW to my knowledge, nor DIN, has ever had a brown wire carry positive voltage to a load. If it were my car, I would change the wire colors or at the very least paint the first few inches of the brown red. It just can't be safe to have conflicted color coded circuits in the same vehicle.

So although I back down, I still maintain confusion as to how such a system could have come about.

Duncan
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Wildthings
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PostPosted: Thu May 06, 2021 7:47 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

DuncanS wrote:
OK, so I'm wrong here. This can not possibly be a Wolfsburg wiring schedule. VW to my knowledge, nor DIN, has ever had a brown wire carry positive voltage to a load. If it were my car, I would change the wire colors or at the very least paint the first few inches of the brown red. It just can't be safe to have conflicted color coded circuits in the same vehicle.

So although I back down, I still maintain confusion as to how such a system could have come about.

Duncan




It is not at all unusual to find that colors don't match up when attaching the DIN factory harness to some accessory, be it a fan motor, fridge, stereo, or other.
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howler9
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PostPosted: Thu May 06, 2021 7:49 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

DuncanS wrote:

So although I back down, I still maintain confusion as to how such a system could have come about.

Duncan


Woof, I got a scare there. And I have to say, I was also confused that they had such color changing wires here. The brown, blue, etc. wasn't even reflected in the Bentley.
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PostPosted: Fri May 07, 2021 6:01 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

^^^ Not VW's fault...I blame the hacks at Westfalia... Rolling Eyes

Wink

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PostPosted: Fri May 07, 2021 8:55 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Those who think 'brown is always ground' should take great care when encountering mains voltages in Europe...
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PostPosted: Fri May 07, 2021 9:03 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

dhaavers wrote:
^^^ Not VW's fault...I blame the hacks at Westfalia... Rolling Eyes

Wink

- Dave

In the case of the fridge, Dometic is to blame.
There's a diagram on top of the fridge with the color codes on it. This is on my Rm182B (1990 Westy with automatic piezo):
Image may have been reduced in size. Click image to view fullscreen.

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PostPosted: Fri May 07, 2021 9:59 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Anyone with a ProMariner ProSport Dual Bank charger have it hooked up to only one battery? When I got this it was charging aux and starter battery (both lead acid) but thinking LiFePO for aux moving forward and wondering if I can use the lithium charge profile (20amp model) to keep aux battery charged, but assuming I don't want that charge profile on the starter battery, so thinking of simply disconnecting from starter (alternator does a pretty good job and might get a trickle charger for winter maintenance, but that's later)

can you run these with only one battery hooked up?
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PostPosted: Fri May 07, 2021 9:42 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Will a golf or jetta steering wheel of the same era work for the vanagon?
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PostPosted: Sat May 08, 2021 3:34 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

whafalia wrote:
Will a golf or jetta steering wheel of the same era work for the vanagon?


Don't know, I've seen GTI ones used
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DuncanS
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PostPosted: Sat May 08, 2021 3:58 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Lots of threads on this.
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PostPosted: Sat May 08, 2021 6:52 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

whafalia wrote:
Will a golf or jetta steering wheel of the same era work for the vanagon?


Yes.
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PostPosted: Sat May 08, 2021 8:37 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Thank you all with the help on the dometic fridge. One thing I realized it might eat up my lifepo4 100Ah battery. If the dometic takes 7 amps, would it be 12v x 7 amps = 84 Ah or is it just 7 Ah? I hope it is the latter. . . Shocked
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PostPosted: Sat May 08, 2021 9:10 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

howler9 wrote:
Thank you all with the help on the dometic fridge. One thing I realized it might eat up my lifepo4 100Ah battery. If the dometic takes 7 amps, would it be 12v x 7 amps = 84 Ah or is it just 7 Ah? I hope it is the latter. . . Shocked

In one hour it's be 7Ah, in 12 hours (nothing to do with volts) it'd be 84Ah sucked out of the battery. As you don't really want a LiFePO4 battery to be outside of 10% to 90% charged (so 80Ah available in your case), that 84Ah is more than your battery can give without excessively shortening its life.

Don't even bother to think about running the fridge on 12V power without the engine running. Your 100Ah system will be fine for lights and radio etc for a couple of days, and that's it.
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PostPosted: Sun May 09, 2021 12:16 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Can anybody provide a comparison of relative compression and rebound damping between OME, Bilstein (black) and Bilstein HD (yellow) Syncro shocks?
My inquiries have been inconclusive.
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PostPosted: Sun May 16, 2021 8:56 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Is there any reason for a daisy chain of ground cables that are strung from the engine ground to the little stud/bolt next to the distributor, then to 2 of the stud/nuts on the base of the breather tower?

Is it possible the main ground location isn't "grounded enough"?

Is there an "Official WTF was the previous owner thinking" thread?
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PostPosted: Sun May 16, 2021 10:26 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Blakesinclair wrote:
Is there an "Official WTF was the previous owner thinking" thread?

That covers about half of all the threads and posts on TheSamba. The other half being "WTF was Volkswagen thinking?" threads.
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PostPosted: Mon May 17, 2021 1:57 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

fxr wrote:
howler9 wrote:
Thank you all with the help on the dometic fridge. One thing I realized it might eat up my lifepo4 100Ah battery. If the dometic takes 7 amps, would it be 12v x 7 amps = 84 Ah or is it just 7 Ah? I hope it is the latter. . . Shocked

In one hour it's be 7Ah, in 12 hours (nothing to do with volts) it'd be 84Ah sucked out of the battery. As you don't really want a LiFePO4 battery to be outside of 10% to 90% charged (so 80Ah available in your case), that 84Ah is more than your battery can give without excessively shortening its life.

Don't even bother to think about running the fridge on 12V power without the engine running. Your 100Ah system will be fine for lights and radio etc for a couple of days, and that's it.


You might do a but better than this

The draw will be 7A x hours * duty cycle, which will depend on the temperature , by the typically 33-50%

7A seems high , though, they typically pull 2-3A once started.
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PostPosted: Mon May 17, 2021 5:56 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Abscate wrote:
fxr wrote:
howler9 wrote:
Thank you all with the help on the dometic fridge. One thing I realized it might eat up my lifepo4 100Ah battery. If the dometic takes 7 amps, would it be 12v x 7 amps = 84 Ah or is it just 7 Ah? I hope it is the latter. . . Shocked

In one hour it's be 7Ah, in 12 hours (nothing to do with volts) it'd be 84Ah sucked out of the battery. As you don't really want a LiFePO4 battery to be outside of 10% to 90% charged (so 80Ah available in your case), that 84Ah is more than your battery can give without excessively shortening its life.

Don't even bother to think about running the fridge on 12V power without the engine running. Your 100Ah system will be fine for lights and radio etc for a couple of days, and that's it.


You might do a but better than this

The draw will be 7A x hours * duty cycle, which will depend on the temperature , by the typically 33-50%

7A seems high , though, they typically pull 2-3A once started.


Abs I think the fridge is the stock Dometic using the 12V heater element. Not a low energy use compressor fridge Dometic.
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fxr
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PostPosted: Mon May 17, 2021 8:31 am    Post subject: Re: Official lazy person's stupid question thread Reply with quote

Abscate wrote:
fxr wrote:
howler9 wrote:
Thank you all with the help on the dometic fridge. One thing I realized it might eat up my lifepo4 100Ah battery. If the dometic takes 7 amps, would it be 12v x 7 amps = 84 Ah or is it just 7 Ah? I hope it is the latter. . . Shocked

In one hour it's be 7Ah, in 12 hours (nothing to do with volts) it'd be 84Ah sucked out of the battery. As you don't really want a LiFePO4 battery to be outside of 10% to 90% charged (so 80Ah available in your case), that 84Ah is more than your battery can give without excessively shortening its life.

Don't even bother to think about running the fridge on 12V power without the engine running. Your 100Ah system will be fine for lights and radio etc for a couple of days, and that's it.


You might do a but better than this

The draw will be 7A x hours * duty cycle, which will depend on the temperature , by the typically 33-50%

7A seems high , though, they typically pull 2-3A once started.

No duty cycle on the old Dometic. It takes 7A continuous. There's no thermostat control.
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PostPosted: Wed May 19, 2021 2:36 pm    Post subject: Re: Official lazy person's stupid question thread Reply with quote

A/C was struggling, suspected low refrigerant.
Found Schraeder valves were leaking, tightened both.
Recharged A/C w/ 2.5 lb R134a.
Now compressor cycles on for 30 seconds or so, then shuts off.
Eventually blows coldish air.

What could be the culprit?

Note Subie compressor was plumbed to VW system by P.O. at motor swap with conversion high and low pressure fittings installed.
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