the link above is the one I found for MFS test. All the resistance values were very close to what the chart shows. In some cases they weren't exact but very close. I tested this with the MFS out. I'd have to take the connectors back off the GEM and check the resistance values on the same wires at the GEM plug to ensure the signals are getting from the switch to the actual GEM. Could be one of the connectors, either on the MFS or the GEM - when I had it apart all the pins looked clean at the GEM connectors (two bolt on ones) and on the MFS connectors. I could not get the small grey connector out of the side of the GEM itself - these are the inputs I'm assuming? The connector did not want to come out, I did not want to break it. I opened up the GEM and there were no signs of moisture at all, no rust.
Having checked all fuses and everything again - installing all fuses where they should be. I took apart the negative post of the battery and cleaned up the clamp (very corroded) and checked the ground wire hookups to the battery, wires do not to be corroded or anything. From the wiper motor connector I confirmed there was good ground (closed circuit from negative post to black wire on connector).
With all fuses in and good, my symptoms still are:
No wipers - hence no washer pump
No door / key in ignition / light chimes
No Dome light
Everything else on the vehicle works fine, no issues.
Physically, it's very difficult to put power to the motor connection because of the connector socket. I need to put power on blk/wht, and wht - and at the same time ground black - which is in between the two powers. I have alligator clips - I'll try it if I can insulate between the alligator clips somehow. If I took the whole assembly back out of the truck it would be easier - might have to.
I'm going to see if the Haynes manual has the wiring diagrams I need - it would save me from bothering you.
If the small grey connector on the side of the GEM carries the inputs - I'll check the values from the switch at that connector. If the inputs are getting there and I find that the motor is good, I'll know it's got to be the GEM. Do you agree.
If I put