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Re: [T3] Suggestions on finding a short in the wiring harness?


On 7 Aug 2006 at 17:05, Graham wrote:

> I have a 70 squareback, 

> OK, now the problem. When the key is put in the run position, the car
> is fine, I hear the fuel pump going, and all lights and accessories
> get power. When the starter button is depressed, the car immediately
> loses ALL power. No fuses blow in the glovebox, but everything dies,
> and stays dead, until the battery is disconnected and reconnected. Is
> there a circuit breaker I don't see in the wiring harness that is
> tripping? I'm thinking that the short is occuring in either the
> starter/solenoid, the generator/regulator or the wiring of those to
> the battery, as all accessories seem to work fine. 

When you remove the battery wire to "reset" this problem, is there a 
fair sized spark?

If there is, then it sounds like a problem in the starter solenoid. 
In this case, I would expect that you must have wires that are 
melting until you can disconnect things.  

If there is no spark, then I suspect that you have a bad connection 
(not a short) somewhere in the battery circuit. Check both ends of 
the ground wire and both ends of the positive wire.

It's also possible that this is a battery problem which could only be 
fixed by replacing the battery.

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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