Chasing down a spark/no fuel issue on a 1993 RRC LWB with the 4.2l. No power to the fuel pump at this point. Starting to work my way through the diagnostics for the fuel injection system and want to ensure I'm following what the test procedure is telling me to do.
If you look at test procedure 3 for checking operation of the main relay it shows measuring the voltage on pin 87 of the main relay. My question(s) is/are- Am I checking voltage with the relay installed and reaching in to the desired pin for the voltage or am I going from the relay base? The other question is- is it acceptable to use the grounds on the 40 pin connector to the ECU for the voltage measurements?
Sorry if these have been answered already...
Thanks,
Scott
If you look at test procedure 3 for checking operation of the main relay it shows measuring the voltage on pin 87 of the main relay. My question(s) is/are- Am I checking voltage with the relay installed and reaching in to the desired pin for the voltage or am I going from the relay base? The other question is- is it acceptable to use the grounds on the 40 pin connector to the ECU for the voltage measurements?
Sorry if these have been answered already...
Thanks,
Scott