Wet Weather Electrical Gremlins - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by R_S_C, this thread has received 6 replies and been viewed 1121 times.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 07-23-2009, 07:11 PM Thread Starter
Member
 
Join Date: Jan 2006
Posts: 100
Points: 18,305
Thanks: 4
Thanked 2 Times in 2 Posts
Wet Weather Electrical Gremlins

So for the past year I've noticed that when we have a heavy downpour, and the truck sits through it some weirdness happens. First thing I will notice is the key fob no longer works and the vent fan will turn off and on with no keys in the ignition. If this doesn't freak you out enough to run and hide, the truck starts and runs fine, but the the transmission light blinks and the speedo jumps all around while driving. If you leave it for a day, it seems to "dry out" and all is back to normal. Lucky for me we've been in a drought so I haven't been too worried about fixing it. But with a possible wet winter coming up, I'm trying to venture to guess where to start...

At first I thought it might be the ECU getting wet, but wouldn't that cause random weirdness? The issues I see are the same every time. Is there a wiring harness or relay that would effect these particular systems?

Any help is appreciated!

2010 F250 6.4 - Stock

SOLD 2001 F250 7.3 Platinum Edition
Garrett Ball-Bearing Turbo/AFE Stage 2/AIH Plug/Sonnax/5" Exhaust/DP-TUNER Chip
R_S_C is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 07-23-2009, 07:34 PM
Senior Member
 
plainredtruck's Avatar
 
Join Date: Dec 2008
Location: Hickory Tavern, SC
Posts: 4,090
Points: 30,351
Thanks: 275
Thanked 444 Times in 285 Posts
Images: 11
You shouldn't have a GEM module, I don't think (don't remember when they changed that, though).

Maybe the IDM? I've changed mine. Didn't help.

Maybe the CPS? Also changed mine. Didn't help.

PCM? I certainly hope not.

All I can figure is there is some sort of chafed wire where the water has some effect. Maybe the extra weight of water on the wring causes it to contact a ground or a drop forms just at the right moment?

I'm stumped by mine as well.

I still get a hard skip on occasion while going down the road during the rain. It's as if the PCM is shorting very briefly. It throws a code, but I'm never close to a scanner.

Wish you well figuring it out.

prt

'99 F250 X-cab 2wd

powered by DP-Tuner

My Photography addiction


Mafia # 27






plainredtruck is offline  
The Following User Says Thank You to plainredtruck For this addition to TDG:
R_S_C (07-23-2009)
post #3 of 7 (permalink) Old 07-23-2009, 08:57 PM
Junior Member
 
balz out's Avatar
 
Join Date: May 2009
Location: jefferson, new jersey
Posts: 296
Points: 39,510
Thanks: 10
Thanked 23 Times in 23 Posts
i have the same exact problem and was going to post a thread on here about it, it sucks...since mine is stick speedo does it when i get over 30 mph when im banging through the gears

2000 f350 7.3 ext cab 6speed- 4inch dp, 5inch straight pipe, ts 6 pos chip. stock 140 100 75 50 high idle, zoodad, fpr shimmed, 6637 intake, 5inch lift, foil delete, beans idm, stage one injectors....r.i.p was fun when it lasted

94 mack rd e7350 mack 12speed roll bed
balz out is offline  
The Following User Says Thank You to balz out For this addition to TDG:
R_S_C (07-24-2009)
post #4 of 7 (permalink) Old 07-23-2009, 09:11 PM
Senior Member
 
4play's Avatar
 
Join Date: Dec 2008
Location: norman, ok
Posts: 1,700
Points: 41,544
Thanks: 55
Thanked 387 Times in 342 Posts
i have seen simular problems with the f-150, expeditions. there was a problem with the windshields leaking, water will travel down the a-pillar the drip behind the dash and run down into the fuse box and gem module. i have seen a few a these and cause about the same things you are complaing of. your truck doesnt have the gem module but it might be possible that water is getting into the fuse box? have you ever noticed the floor being wet/damp etc?
4play is offline  
The Following User Says Thank You to 4play For this addition to TDG:
R_S_C (07-24-2009)
post #5 of 7 (permalink) Old 07-24-2009, 02:17 AM
Senior Member
 
bigastrk's Avatar
 
Join Date: May 2006
Location: Eagle River, AK
Posts: 645
Points: 24,544
Thanks: 46
Thanked 48 Times in 27 Posts
I had a very similar situation with my excursion and since then I have changed the dash wiring harness and all is well again. My heater/fan controls wouldn't work, the speedo would stop working and the dash lights would go off. Once I replaced the wiring harness all was well again.

03 6.0L Excursion < Sold
bigastrk is offline  
The Following 2 Users Say Thank You to bigastrk For this addition to TDG:
plainredtruck (07-24-2009), R_S_C (07-24-2009)
post #6 of 7 (permalink) Old 07-24-2009, 12:58 PM Thread Starter
Member
Threadstarter
 
Join Date: Jan 2006
Posts: 100
Points: 18,305
Thanks: 4
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by 4play View Post
i have seen simular problems with the f-150, expeditions. there was a problem with the windshields leaking, water will travel down the a-pillar the drip behind the dash and run down into the fuse box and gem module. i have seen a few a these and cause about the same things you are complaing of. your truck doesnt have the gem module but it might be possible that water is getting into the fuse box? have you ever noticed the floor being wet/damp etc?
funny you should mention that, i do have a slight leak in my windshield and have been putting off getting it fixed. I think i'll start down that route. Just find it odd that water+electronics would cause the exact same behavior each time....would have thought it would be more random.

2010 F250 6.4 - Stock

SOLD 2001 F250 7.3 Platinum Edition
Garrett Ball-Bearing Turbo/AFE Stage 2/AIH Plug/Sonnax/5" Exhaust/DP-TUNER Chip
R_S_C is offline  
post #7 of 7 (permalink) Old 07-24-2009, 03:26 PM
Senior Member
 
4play's Avatar
 
Join Date: Dec 2008
Location: norman, ok
Posts: 1,700
Points: 41,544
Thanks: 55
Thanked 387 Times in 342 Posts
Quote:
Originally Posted by R_S_C View Post
funny you should mention that, i do have a slight leak in my windshield and have been putting off getting it fixed. I think i'll start down that route. Just find it odd that water+electronics would cause the exact same behavior each time....would have thought it would be more random.
when we see these the glass shop will come out and reseal the windshield, if yours is cracked they will have to replace it, but if its pitted and such it would be a good time to replace it as the labor is basically the same.
4play is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Electrical gremlins please help. valcas1 1994-2003 7.3L Power Stroke 15 06-19-2009 08:25 PM
6.5 gremlins plowking 6.5L Diesel Engine 4 04-17-2007 05:17 AM
Gremlins Show your NFL Spirit! WNYPA The Parking Lot 4 09-17-2006 08:20 PM
Electrical Gremlins StrokerAce 5.9L Cummins (2003-2007.5) 14 03-29-2006 01:32 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome