Intermittant issue
Thread Starter
|
Posting Guru
Joined: Jul 2010
Posts: 1,711
Likes: 0
From: Fort Worth
Intermittant issue
I know that it is a common problem, so I just need to know what to check. A while back I was having an electrical issue with fuse 35 blowing causing my radio and power windows to fail. The truck went to the dealer and they found the wire under the headliner, fixed it and no more blowing fuses or non-working stuff. Now, yesterday, I get into the truck after work and the radio and power windows weren't working. No blown fuses. I drove about 1/10th of a mile and the radio came on and the windows worked. This is the only time it has done this and I can't seem to get it to repeat, but I want to know what to check and fix. Thanks.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
The radio, power windows, map lights (I think) and power rear sliding window (if you have one) are all powered by the Accessory Delay Relay. This allows them to operate for awhile after the key is turned off.
The Accessory Delay Relay coil is powered by the HEC (instrument cluster) on newer trucks, or possibly the GEM on older trucks that have one. It is the "timer" that holds the relay closed while the key is on and for a period of time after it is turned off (or the doors are opened).
The cause of this problem is either the relay, or potentially a problem in the HEC or GEM. Most likely is the relay.
The Accessory Delay Relay coil is powered by the HEC (instrument cluster) on newer trucks, or possibly the GEM on older trucks that have one. It is the "timer" that holds the relay closed while the key is on and for a period of time after it is turned off (or the doors are opened).
The cause of this problem is either the relay, or potentially a problem in the HEC or GEM. Most likely is the relay.
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
If a bad relay is suspected, go into the relay box up front, and substitute the relevant relay with another one in the box.
9 chance out of 10, a simple substitution of a frequently used relay to an infrequently used relay in the box will cure all problems.
Or, they are cheap enough to just replace it.
But, this thing sound much more like an electronic glitch.
A weak relay will be there all the time.
9 chance out of 10, a simple substitution of a frequently used relay to an infrequently used relay in the box will cure all problems.
Or, they are cheap enough to just replace it.
But, this thing sound much more like an electronic glitch.
A weak relay will be there all the time.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
If the Accessory Delay Relay were up front on a 2002, (indeed if the 2002 had a Power Distribution Box with relays up front), then that might be helpful.
Here is the location of the Accessory Delay Relay on a 2002. Bottom center in the diagram.
Here is the location of the Accessory Delay Relay on a 2002. Bottom center in the diagram.
Thread Starter
|
Posting Guru
Joined: Jul 2010
Posts: 1,711
Likes: 0
From: Fort Worth
So I got in the truck this afternoon after work and again, no windows, no radio. This time it fixed itself sooner (within 15 seconds). So this seems to be the relay? It is just a generic relay right? One I can pickup at an auto parts store?
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
I think that is most likely the problem.
You can try taking it out and taking it to an auto parts store. I did that here and got that dumb look like something was growing out of my head. But then, I live in the middle of nowhere, with two tiny auto parts stores.
I got an OEM relay at Ford for about $10.
You could also try the relay swap bit, just to be sure. Swap it with something like the fuel heater relay, which isn't terribly critical.
You can try taking it out and taking it to an auto parts store. I did that here and got that dumb look like something was growing out of my head. But then, I live in the middle of nowhere, with two tiny auto parts stores.
I got an OEM relay at Ford for about $10.
You could also try the relay swap bit, just to be sure. Swap it with something like the fuel heater relay, which isn't terribly critical.
Thread
Thread Starter
Forum
Replies
Last Post
Went724
1999 - 2016 Super Duty
4
Apr 8, 2014 09:48 PM
miserableloser
1999 - 2016 Super Duty
7
Oct 21, 2012 11:25 AM
bulletpruf
1999 - 2016 Super Duty
1
Jul 19, 2012 10:59 AM
