Ordered my new PCM
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Joined: Jul 2007
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From: The Redneck Riviera
Ordered my new PCM
Well, a reman, anyway. It'll be along in the morning.
But I'm wondering what caused the failure in the first place and if maybe I caused it somehow.
When I installed the rear airbags on my truck the air pump has a minimum pressure switch that activates the pump automatically if the pressure drops below a certain level (about 5 lbs). It was reccommended that you hook it up to a key switched terminal on the fuse box so that it would only operate when the key was on or in acc.
There is a slight leak in the system and every couple days when I turn on the key, the pump would instantly begin running, along with the fuel pump and whatever other systems kick in at startup. It has a 15 amp fuse and the motor is rated at 12 amps.
So I was wondering if maybe all that current surge on startup may have fried the PCM over a period of a month or so. I'm not wanting to install the new PCM and fry it also.
Should I try to isolate the pump? Maybe put a physical switch in line that I can keep turnrd off unless I need to run the pump.
Good idea? Don't worry about it? What?
Any thoughts?
Rob
But I'm wondering what caused the failure in the first place and if maybe I caused it somehow.
When I installed the rear airbags on my truck the air pump has a minimum pressure switch that activates the pump automatically if the pressure drops below a certain level (about 5 lbs). It was reccommended that you hook it up to a key switched terminal on the fuse box so that it would only operate when the key was on or in acc.
There is a slight leak in the system and every couple days when I turn on the key, the pump would instantly begin running, along with the fuel pump and whatever other systems kick in at startup. It has a 15 amp fuse and the motor is rated at 12 amps.
So I was wondering if maybe all that current surge on startup may have fried the PCM over a period of a month or so. I'm not wanting to install the new PCM and fry it also.
Should I try to isolate the pump? Maybe put a physical switch in line that I can keep turnrd off unless I need to run the pump.
Good idea? Don't worry about it? What?
Any thoughts?
Rob
New User
Joined: Apr 2010
Posts: 20
Likes: 0
From: Richland , WA
It could be alot of things, age of the truck has a part to play in it, was the engine bay pressure washed recently, that can lead to a fried computer...as for a switch being the problem, it depends which one u tapped into...id put in on a manual switch by thats my 2 cents
