First let me say howdy, just found this site while trying to find info on my Dads 95 Roadmaster. He's 78 years old so I need this thing to function like it's suppose to make sure he gets from point A to B and back again safely.
We just had to put heads on his RM and now the fans don't work. (Which may be why we had to put heads on it.)
Anyway...
The relays work, I'm just not getting a return path to ground from the ecm.
Meaning, in the fuse box I have 12V for both the fan contact & the coil of the relay, if I supply a path to ground the relay actuates and the fans come on.
The gauge works, but the temp light never comes on even when the car gets hot. (maybe the same bad ground?) If I unplug the temp sensor for the ecm & light, (sensor at water pump) the engine will cut off.
Before I start digging to look for the ground for the ecm, or is there something I'm missing that needs to be checked first?
I unplugged the MAF restarted & both fans did come on... ?
Also, if I unplug the temp sensor at the water pump the fans will come one, but it is hard to start the engine. If I jump across the plug terminals on the temp sensor, it set the service engine light, & both fans run, but the temp light still doesn't come on.
Thanks in advance for any help you may provide.