Quote:
Originally Posted by T77911S
now to the yellow wire.
the solenoid requires a lot of current to pull in. resistance is the killer here too.
bad ignition switch, the connector on the relay panel, car alarms are problems for the yellow wire. after market car alarms that have been hacked into the yellow wire are a very bad idea for the 911 since that is such a long run to the starter.
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+10. Check, clean and spread the connectors end-to-end (e.g. from the ignition switch harness/bulkhead plugs through the engine bay 14-pin connector) would be my advice.
You cannot rely on it "buzzing out"; it has to carry the current to operate the solenoid. Voltage drop is the red flag.