Originally Posted by Deaconblu
Hello, i have a 95 Grand Cherokee that electricly is acting crazy. lott of intermintment problems. very suspishous ecm is bad. My question, when i pull the asd relay there is 12 volts at three of relay inputs with switch on. the bottom slot, one closest to front of car has 8 volts. Is this normal?? Should all four relay inputs have voltage??
thanks for any help/
With the ignition in the ON position you should have 12V at 2 of the ASD relay pin sockets in the PDC and ground on the third one (which comes from the ECM). The third pin gets voltage through
the ASD relay. Keep in mind a relay is nothing more than a heavy duty switch. The relay needs power and round to close the circuit that goes through it
to run a specific device(s).
Check the second ground wire that goes from the firewall to the engine block it is may be