rasouth
Well-Known Member
- Joined
- July 29, 2015
- Messages
- 345
- Reaction score
- 49
- City, State
- Riverside, CA
- Year, Model & Trim Level
- 96 Explorer XLT 4.0 OHV
I have been trying to diagnose why my wipers are not working for quite a while. I have gone through all the normal checks and tests... fuses, relays, motor, MFS, wiring, connections... While testing the multi function switch, disconnected and out of the car, it tested okay, I noticed that on the side where the wire harness plugs into it there are three metal tabs that correspond with the wires that I tested. On the diagram it said these wires were number 13, 14 and 15. I tested from these tabs and it tested okay again.
So, to my point, believing it might be my GEM I found a numbers matching GEM from another Explorer and still no wipers. Testing to see if I had continuity to my GEM I popped out the circuit board and tested from switch, using those metal tabs, to Gem board. I had continuity but tested to see if I had the correct Ohms, 47.6k, but it read around 8k Ohms at the switch and on the board, no matter what position I had the switch. I unplugged harness from Gem and I got 47.6 Ohms at the switch. This happened on BOTH GEMs that I have. I did this a couple of times to be sure.
I should add that I have an OBD2 adapter and using FORScan I tested the GEM and everything worked! Wipers, washers, windows, locks, etc...
Is this a sign of a bad GEM? (Two bad GEMS, possibly?)
So, to my point, believing it might be my GEM I found a numbers matching GEM from another Explorer and still no wipers. Testing to see if I had continuity to my GEM I popped out the circuit board and tested from switch, using those metal tabs, to Gem board. I had continuity but tested to see if I had the correct Ohms, 47.6k, but it read around 8k Ohms at the switch and on the board, no matter what position I had the switch. I unplugged harness from Gem and I got 47.6 Ohms at the switch. This happened on BOTH GEMs that I have. I did this a couple of times to be sure.
I should add that I have an OBD2 adapter and using FORScan I tested the GEM and everything worked! Wipers, washers, windows, locks, etc...
Is this a sign of a bad GEM? (Two bad GEMS, possibly?)