power windows, and windshield wipers only work when a door is ajar and only work intermittenly when a door is ajar, otherwise they don't work at all.

20

Asked by Feb 27, 2016 at 11:32 PM about the 2002 Ford F-150 Lariat SuperCab 4WD LB

Question type: Maintenance & Repair

The door windows and wind shield wipers stopped working. However, I noticed that when a door is ajar they will work periodically. Not so coincidentally, I hear what sounds like a relay engaging in the vicinity of the starter solenoid and when it engages, which is about every 3 seconds, the door windows and/or the windshield wipers will work for about a second - again as long as a door is ajar or open.

5 Answers

21,660

I will assume the door which activates those things is only the drivers side. Suspect a short circuit in the drivers side and check accordingly. Also, is the clicking sound you hear coming from the solenoid relay attached to the fender well, near the battery? If the relay is getting power after the engines has started, could be an electrical problem within the starting/ignition circuit.

210

Also check for bad ground!

20

Aloha! Thanks for the great suggestions. However the problem occurs regardless of door open (4 door crew cab) or window used. After further research I stumbled on several web sites that mention the G.E.M. (General Electronic Module). The GEM connects directly to the back side of the fuse box. The GEM is not the PCM or the ECM, but rather a separate unit where all of the electrical systems fused through the cabin fuse box are routed through. Symptoms of malfunction of the GEM module vary wildly but do include weird symptoms like the ones I experienced below. Unfortunately the GEM is not mentioned at all in the commercially available maintenance manual, which did not help in troubleshooting. I was able to narrow down it to the GEM by removing fuse number 17 (5A) labeled "GEM" in the users manual, which after it was pulled completed stopped the weird symptoms but also stopped the windshield wipers, door windows, and other systems from working entirely. I have ordered one and unfortunately brand new units are really expensive (~$500). It's on the way and should be here early next week. I will update this blog one last time after I install the new unit, to indicate whether or not it worked. Thanks again!

2 of 2 people found this helpful.
210

Yes I would be interested to learn the outcome. Please re-post.

Windshield won't come on and the window go up or down and light in domelight don't work. L

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 225,656 nationwide F-150 listings starting at $1,250.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,730
  • #2
    dandyoun
    Reputation
    4,660
  • #3
    tennisshoes
    Reputation
    3,370
View All

Related Models For Sale

Used Chevrolet Silverado 1500
3,004 Great Deals out of 162,981 listings starting at $1,500
Used GMC Sierra 1500
1,262 Great Deals out of 63,300 listings starting at $1,200
Used Ford F-250 Super Duty
491 Great Deals out of 47,002 listings starting at $1,817
Used Toyota Tundra
693 Great Deals out of 34,603 listings starting at $2,799
Used Dodge Ram 1500
378 Great Deals out of 11,014 listings starting at $1,699
Used Toyota Tacoma
670 Great Deals out of 41,420 listings starting at $2,500
Used Ford Mustang
450 Great Deals out of 42,576 listings starting at $1,488
Used Ford F-350 Super Duty
382 Great Deals out of 26,221 listings starting at $3,900
Used Ford Explorer
1,198 Great Deals out of 64,659 listings starting at $1,499
Used Chevrolet Tahoe
904 Great Deals out of 39,855 listings starting at $1,990
Used Chevrolet Silverado 2500HD
450 Great Deals out of 29,764 listings starting at $2,000

Used Cars For Sale

2018 Ford F-150 For Sale
13 Great Deals out of 133,295 listings starting at $18,092
2017 Ford F-150 For Sale
216 Great Deals out of 17,660 listings starting at $18,000
2016 Ford F-150 For Sale
249 Great Deals out of 7,628 listings starting at $16,997
2015 Ford F-150 For Sale
518 Great Deals out of 11,105 listings starting at $9,000
2014 Ford F-150 For Sale
767 Great Deals out of 14,907 listings starting at $7,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.