MVK , I am wide open to guidance on how to correctly trouble shoot the relay
I just went and bought a reasonable multimeter , lets see if I can use it .
All the wires to the GPs have continuity.
All the GPs measure .02ohm on the bench and 0 ohm installed in the car.
Pulled the cover off the relay , looks like new . Points are clean , nothing obviously fried on the circuit board . It looks new too .
It seems odd to me ('cause I don't understand) that the resistance measured between the case of the GP and the insulated threaded end is so low , like there is an open path there , so why does it look like there is an insulator washer there ??
This is on the new plugs .
Tested the non working plugs ,, just the same , about .2 ohm even though they don't glow .??
Dash light indicator still only works when the plug is pulled from the relay ?? .
I'm about as lost as I can be .