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Fuel pump electrical path 200 1989

uid 27's pic
posted by  Art Benstein on  Wed Nov 2 13:50 CST 2022
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

If you have battery at #30 with the key on, but none at #85 or #87/1 (orange wires), check relay #86/1 (yellow/black). With the key on, 86/1 should be near ground, supplied by the ECU. All measurements are referenced to ground, never to the + battery.

If you have a test light, you won't be fooled by the high impedance multimeter seeing voltage through a high resistance such as a corroded connection.

I have to check back in the thread, but I thought you said the fuel relay is new. Of course that doesn't mean it is good. Here's the circuit as it is in a '91, when the blade fuse was moved inside to #6, but aside from that path from the red wire the circuit is good for '89.







--
Art Benstein near Baltimore






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