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Short Circuit somewhere in Wiring Harness 140-160

posted by  CeeBee1 on  Wed Jul 14 16:44 CST 2021
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last visit: Wed Oct 16 20:06 CST 2013
[RELATED]

You wrote: "I have a short to ground, somewhere in the harness between the positive side of the pump and the auxiliary air valve connector, (in the yellow wire)."
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You have a B20 Engine with a K-Jet FI system. The AuxAir Valve's only function is 'idle control'. It is only Open when cold. The wires to it Heat the mechanical thermostatic spring that closes the valve as the engine warms up and brings the idle back to normal.

You can disconnect it and the Fuel Pumps will run and the engine will start and run. If the ambient Temp is above 65 degrees the valve will be in the 'closed' position and the engine will idle as normal, the heat from the engine will close the valve (it's mechanical) with or without the "heater" being connected.

Look elsewhere for the reason the pump fails to run.






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