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oldthingguy
Samba Member
Joined: December 02, 2007
Posts: 146
Location: California
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 Posted: Mon Aug 01, 2016 6:25 pm Post subject: welding - I did something wrong |
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I was welding some holes up in my single cab today, they turned out fair but the real problem came afterwards. I went to start it and the gauges come to life but when I turn the key to the start position nothing happens. I have 12v at the battery and coil......any thoughts? All fuses look good too. Ugh!!
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73 914 2.0 - sold
63 single cab
73, 73 and 74 Thing - gone
64 notch - gone
60 23 window - gone
57 oval - gone
plus a few others I should have kept |
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GLHTurbo
Samba Member
Joined: March 30, 2009
Posts: 1376
Location: New Jersey
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| Posted: Mon Aug 01, 2016 6:32 pm Post subject: Re: welding - I did something wrong |
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was the battery disconnected during welding?
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1957 Beetle
1966 Bus |
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esde
Samba Member
Joined: October 20, 2007
Posts: 5966
Location: central rust belt
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| Posted: Mon Aug 01, 2016 7:06 pm Post subject: Re: welding - I did something wrong |
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Yes, you probably fried the ecu.
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modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that. |
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Abscate
Samba Member
Joined: October 05, 2014
Posts: 22648
Location: NYC/Upstate/ROW
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| Posted: Mon Aug 01, 2016 7:25 pm Post subject: Re: welding - I did something wrong |
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There are lots of EC........U in the classifieds, no worries
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.ssS! |
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jason
Samba Member
Joined: August 07, 2002
Posts: 3444
Location: Garage
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| Posted: Mon Aug 01, 2016 8:13 pm Post subject: Re: welding - I did something wrong |
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| You hook it back up correct? Does nothing include cranking over? |
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oldthingguy
Samba Member
Joined: December 02, 2007
Posts: 146
Location: California
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| Posted: Mon Aug 01, 2016 9:15 pm Post subject: Re: welding - I did something wrong |
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Silly me did not disconnect the battery. I went underneath it tonite and jump started the starter with a screw driver....it turned over. I went in and the car turned over with the key. I tried it again and nothing. Went under again and did the screw driver trick again, the Bendix spun but not the starter. I went in the cab and it started with the key, did that about 5 times and all was well. Maybe the starter going bad? Did I do something to the Bendix May have to get a new starter?? Thanks for the replies.
_________________
73 914 2.0 - sold
63 single cab
73, 73 and 74 Thing - gone
64 notch - gone
60 23 window - gone
57 oval - gone
plus a few others I should have kept |
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BarryL 
Samba Member
Joined: November 01, 2004
Posts: 14259
Location: Casa de Oro, California
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| Posted: Tue Aug 02, 2016 9:57 am Post subject: Re: welding - I did something wrong |
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| oldthingguy wrote: |
| Did I do something to the Bendix |
When you turn the key to start it begins a chain reaction and doesn't actually send full juice through the ignition to turn the start armature. The start solenoid has a fine winding of copper wire that creates a magnetic field strong enough to pull a metal cylinder that is connected to the Bendix. When the Bendix is fully pulled in it makes contact with the big battery wire and that sends full current to the armature through a metal contact.
When you weld there are super strong jolts of stray current sent through the metal of your bus and theoretically it returns to the ground you clipped on from your welder. If you didn't disconnect your busses battery ground then some of the jolts can find their way around through places that shouldn't get jolted. It's possible that a little tit formed on the solenoid contact that created a tiny insulation point that you corrected by operating it over and over. Worst case is there is a break in the fine winding. Time will tell.
Or it might be something as simple as a Gremlin that went back into hiding. |
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kintail
Samba Member
Joined: January 01, 2003
Posts: 594
Location: Canada
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| Posted: Tue Aug 02, 2016 2:58 pm Post subject: Re: welding - I did something wrong |
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Did you weld in an area that the wiring harness is in and burn the wires? Seen it done......
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Scott |
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oldthingguy
Samba Member
Joined: December 02, 2007
Posts: 146
Location: California
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| Posted: Tue Aug 02, 2016 7:53 pm Post subject: Re: welding - I did something wrong |
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BarryL - thank you for the explanation and hopefully it was a simple item like you described. Today it started just fine, I'll keep my fingers crossed. Eventually I will replace the starter as I know nothing of it's history and none came from the previous owner.
BTW - some have asked about wires, I was welding some holes in the top portion of the bed floor.
Thanks for all your replies....... 
_________________
73 914 2.0 - sold
63 single cab
73, 73 and 74 Thing - gone
64 notch - gone
60 23 window - gone
57 oval - gone
plus a few others I should have kept |
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| Back to top |
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