'82 CGT, Electrical Problems

Tony Hoffman auditony at gmail.com
Mon Jan 7 05:39:34 PST 2013


German cars don't like to sit. Drive it once a month, at least.

There is a "7" shaped starter relay bypass in the fusebox IIRC. I haven't
worked on one with the older fusebox in a while. If it is there, check for
power while cranking. If none, the problem is between there and the ign
switch, if there is power there, the problem is between there and the
starter solonoid.

The fuel pump will not run till the engine is cranking over with the
ignition on. It is triggered by the hall sender's amplified signal on the
coil negative side. So, till the car is cranking, no fuel pump action
should be expected.
Let us know what you find.


On Sun, Jan 6, 2013 at 6:59 PM, <TWFAUST at aol.com> wrote:

> Here is the short. I am bringing my '82 CGT out of prolonged hibernation.
> It is the usual story, it ran well when I parked it. OK, two problems, the
> starter and the fuel pump. The starter will not operate from the ignition
> switch  and the fuel pump does not seem to run. I put a multi meter on the
> exciter  wire to the starter solenoid and got such low voltage that I
> suspect I
> was  measuring leakage. If I jump power directly to the exciter terminal,
> the  starter operates normally. I had spark but it wouldn't run, so I
> checked
> the  fuel pump. There was a deteriorated hose, but the pump doesn't seem to
> run. I  did not check the relay.
> OK, I am not great with reading the wiring diagrams in my Bentley. Since
> they are both powered of the ignition switch, that is a suspect. Are there
> any  other points of electrical commonality between the starter and the
> fuel
> pump?  Any diagnostic suggestions?
> Tom Faust

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