High beams issue!

Hey Mike.

The #1 wire will be hot all times as it is battery feed ... you will need to check something that should be hot whilst vehicle is cranking/running ? (ie. something that is getting a signal from the ECM)

Try this ..check for spark at plugs ...if no spark condition exists ... Measure voltage between terminal IGF and ground with ignition ON. See fig 6 (A/T & M/T Calif.). If voltage is 4.5-5.5 volts circuit is good !!

Turn ignition on. Measure voltage between terminal IGT of ECM connector and ground, while cranking engine. Voltage should be 0.5-1.0 volt.

My thinking here is ... if the MIL is off and the vehicle will not start .... the ECM is not sending a signal to something .... it may be a bad ECM .. it may be you have a bad hot or ground on the ECM and it is losing power/ground periodically ??

It seems to me that when you know the ECM is working (because the MIL is ON) you get a start up .. but when the MIL goes OFF (i'm thinkin the ECM shuts down) you have a stall/no start condition

let me know

Hey Mike.

As you had already tested the relay .. we presumed it was good .. it must have been working intermittently ? ..anyhow the car is running again ... well done and thanks for letting us know the final fix.

All the best