Drove through deeeeep water, now electrical problems
Burning Brakes
Joined: Mar 2008
Posts: 983
Likes: 36
From: Middle Of Kali CA
You need to dry out ALL your electrical connectors. Seat wiring, EBCM in the pass floor board ect. If left long (days), corrosion will leave you chasing elec related issues for a lifetime.
Melting Slicks
Joined: Sep 2006
Posts: 2,736
Likes: 7
From: Redding CA
I'd pull your BCM and PCM immediately. Maybe even open them up but definitely bring them inside your house or somewhere so they can dry out quick. Blow them out with a dust off can..whatever but you don't want any moisture in there.
Disconnect your battery first.
I'd just start unplugging electrical connectors that could have any possible moisture and dry them out accordingly.
Disconnect your battery first.
I'd just start unplugging electrical connectors that could have any possible moisture and dry them out accordingly.
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Pull it apart and dry everything electrical that could have gotten wet before you keep messing around trying to make it work like it sits. Do a compression test on the engine to give an indication of it being mehanically OK.
Peter
Peter
Instructor
Joined: Oct 2010
Posts: 240
Likes: 2
From: Yangpyeong Gyeonggi-Do
Had the same happen to me. Had to have the PCM and TCM replaced. They sit low in the car. Car would start but ran like crap. Only good thing was the insurance covered the tow and replacement cost...... Good luck.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
I'd pull your BCM and PCM immediately. Maybe even open them up but definitely bring them inside your house or somewhere so they can dry out quick. Blow them out with a dust off can..whatever but you don't want any moisture in there.
Disconnect your battery first.
I'd just start unplugging electrical connectors that could have any possible moisture and dry them out accordingly.
Disconnect your battery first.
I'd just start unplugging electrical connectors that could have any possible moisture and dry them out accordingly.
The worst thing the OP could have done in this circumstance, was try to restart the engine after it stalled. This is an unknown variable. I would not crank it over again, before pulling the plugs.........IMO.
Last edited by lucky131969; Apr 18, 2011 at 09:34 AM.
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Thread Starter
Intermediate
Joined: Oct 2010
Posts: 42
Likes: 0
From: nyack ny
Because I'm sitting in the vette right now waiting for my tow, some thoughts. I pulled fuse 25 which resets the bcm, when I replaced it, for a split second the trunk popped, horn honked and interior lights came on. So I know it's the bcm. As soon as I'm home, I'll pull and dry it.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Because I'm sitting in the vette right now waiting for my tow, some thoughts. I pulled fuse 25 which resets the bcm, when I replaced it, for a split second the trunk popped, horn honked and interior lights came on. So I know it's the bcm. As soon as I'm home, I'll pull and dry it.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Some great info here!!
MAKE SURE you completely remove the carpets and let them dry in a warm area (furnace room or in the sun! ) until there COMPLETLY DRY.
There’s a YAW sensor in the passengers foot well below the carpet NEAR THE INBOARD SEAT TRACK. Pull it out and dry the module and connector
Remove the seats and Seat modules.
MAKE sure that the modules and relays under the seat are disassembled and dried. Dry and blow out the seat tracks and motors. Make sure that the power/ comms plug for the seat is cleaned and dried.
There are TWO thin grey connectors to the LEFT of the BCM. That’s the STAR Serial bus terminals. Dry and spray them with WD-40 to displace the moisture in them.
The FUSE BOX needs to be blown out and at a minimum,, sprayed out with WD-40. You MUST displace the moisture. If it were me, I would remove each relay, circuit breaker and fuse one at a time. Inspect, dry and reinsert.
You have a LOT of work to maake it trouble free in the future.
Bill
MAKE SURE you completely remove the carpets and let them dry in a warm area (furnace room or in the sun! ) until there COMPLETLY DRY.
There’s a YAW sensor in the passengers foot well below the carpet NEAR THE INBOARD SEAT TRACK. Pull it out and dry the module and connector
Remove the seats and Seat modules.
MAKE sure that the modules and relays under the seat are disassembled and dried. Dry and blow out the seat tracks and motors. Make sure that the power/ comms plug for the seat is cleaned and dried.
There are TWO thin grey connectors to the LEFT of the BCM. That’s the STAR Serial bus terminals. Dry and spray them with WD-40 to displace the moisture in them.
The FUSE BOX needs to be blown out and at a minimum,, sprayed out with WD-40. You MUST displace the moisture. If it were me, I would remove each relay, circuit breaker and fuse one at a time. Inspect, dry and reinsert.
You have a LOT of work to maake it trouble free in the future.
Bill
Last edited by Bill Curlee; Apr 19, 2011 at 01:48 PM.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
What you don't want, is the water evaporating in place. Any deposits left behind (what you can't see under components).....can lead to dendretic growth. A clean compressed air source is the best way.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
EXACTLY!!!
I had to washed my 98 sediment ladened BCM circuit board with ALCOHOL and scrubbed it with a soft nylon bristle brush, flushed it again and blow dry it with air. SAVED IT!!
It was condensate soaked numerous times when I first purchased the car. The deposits on the traces and soldered joints were really bad!!
BC
I just know i've fixed phones that have went in the drink with this method 
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
Dish detergent and a toothbrush works good for cleaning circuit boards and then you rinse in hot water and blow dry. We just use shop compressor air. You can use the air to blow out all the connectors and fuse block etc too.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN