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 am having problems with my front wipers not working. I have tested the MFS a number of times off the car and on a work bench, getting the correct readings... 46.7k ohms, 11.3k ohms...
My question is has anybody tested the MFS while still in the car and hooked up? When I did this my readings were nowhere near what I expected. I got around 8-10k ohms no matter where I had the switch turned to, i.e. off, low, high.
Let me back up for a minute... I have performed all the basic tests of checking fuses, checking relays, switching relays, motor, connections, continuity between each item, replaced MFS, swapped out the GEM with identical number-matching GEM. I have an OBD2 adapter with Forscan and during the GEM test everything works... wipers, doors, lights, rear wiper, etc. That tells me that I am getting an output signal from the OBD2 adapter to the input side of the GEM (if that makes since... I work with computers a lot) The only thing left out of the loop is the MFS.
If I unplug the 26-pin wire harness from the GEM and test the MFS at the harness I get the correct readings...46.7k ohms...
Now back to my question... Has anybody tested the MFS while still hooked up and plugged in using the three metal tabs that correspond with number 13, 14, and 15 tabs of the MFS?
My question is has anybody tested the MFS while still in the car and hooked up? When I did this my readings were nowhere near what I expected. I got around 8-10k ohms no matter where I had the switch turned to, i.e. off, low, high.
Let me back up for a minute... I have performed all the basic tests of checking fuses, checking relays, switching relays, motor, connections, continuity between each item, replaced MFS, swapped out the GEM with identical number-matching GEM. I have an OBD2 adapter with Forscan and during the GEM test everything works... wipers, doors, lights, rear wiper, etc. That tells me that I am getting an output signal from the OBD2 adapter to the input side of the GEM (if that makes since... I work with computers a lot) The only thing left out of the loop is the MFS.
If I unplug the 26-pin wire harness from the GEM and test the MFS at the harness I get the correct readings...46.7k ohms...
Now back to my question... Has anybody tested the MFS while still hooked up and plugged in using the three metal tabs that correspond with number 13, 14, and 15 tabs of the MFS?