Replace ecm 1 under hood fuse blew when tried to start it
SOURCE: Underhood fuse panel on a 1994 Chevrolet Suburban K2500
Under the hood driver side close to the master cylinder and fender, has black cover , pull cover off.Hope this was helpful.
SOURCE: 4 Wheel drive not functional
There is a TSB on this problem: TSB #03-04-21-001C
Subject:4WD Switch Indicator Lights Flashing, 4WD Inoperative, DTCs C0327, P0500, P0836, P1875 Set (Replace Encoder Motor Sensor, Reprogram TCCM, Inspect Front Drive Axle Engagement Sleeve for Damage/Repair) #03-04-21-001D - (12/04/2003)
Models:2003 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2003 GMC Sierra, Yukon, Yukon XL
with 4WD and Electric Shift or Active Transfer Case (RPO NP1 or NP8)
You can also try removing the TREC fuse (engine fuse box) and reinstall after 30 seconds. Look up the TSB number I gave you and you'll find alot more information.
SOURCE: I have a fuse blowing constantly on my van
you are on a search and destroy mission, i recommend you buy a manual with wiring diagram, at least it will tell you what is hooked on that circuit, thenits a matter of testing wiring, i suspect you have a short somewhere
Testimonial: "Well, thanks for the opinion, even though I read it after fixing my problem. It was indeed a short, as the cover for the wiring harness was missing, and apparently a wire had rubbed bare and was shorting against the valve cover. I couldn't actually see the bad spot, but by carefully moving it I isolated the spot and taped it up really good and put a new cover in place. Thanks for the quick reply though!"
SOURCE: my ecm 1 fuse blows
The diagram below shows everything that runs on that fuse. Check the wiring on these items for a short. If wiring is good, there is a simple way to see which item is shorting out. Unhook all the connectors (don't unhook the VCM) and put a fresh fuse in. Turn the key on--does the fuse still blow? If yes, there is a short in the wiring. If no, the short is in one of the items you unplugged. Now pulg them back one at a time with the key on. Check the fuse after each item until it is burned. Then you will know which part to replace. My first guess would be the coil. Let me know if you can't find any of these or if you have other questions.
I would replace the fuel pump and the fuel pump connector, both have problems in this year that cause excessive current draw and blow the fuse and overheat the system. If the relay socket terminals are discolored from heat that must be replaced as well. Of course before replacing any parts have a GM dealer confirm the problems i have guessed are to the cause.
112 views
Usually answered in minutes!
what is ecm 1 and ecm 2 stand for
×