Ecm fuse on that model should be located under instrument panel
left side of steering column. there are fusible links in the engine compatment passenger side under plastic cover on the firewall.
SOURCE: 1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control
May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.
SOURCE: i have a 1990 Chevrolet C2500 Pickup. It keeps
if it is the ecm b fuse thats blowing i would try disconnecting your oil sending unit and see if it still blows the fuse.i have seen the sending unit short out internally before and blow the fuse.if it is the ecm 1 fuse it is either a chaffed wire or one of your injectors shorted.
SOURCE: 1997 gmc sierra 4.3l new fuel pump and wont start
I have 1993 gmc 4.3 vortec v6 turns over but want start. replaced fuel pump, fuel pump regulator ,ecm, tps, coil
SOURCE: My 1990 gmc sierra quit
Hello there and thank you for choosing fixya
This is a fairly common issue with these vehicals the problem is normally 1 of 3 things all of these should be tested if possiable
1. faulty crank position sensor
2. faulty cam sensor
3. faulty ecm this is the most common but is the most expensive
Make sure to test all of the fuses Both maxi fuse and the normal fuse along with the square fuse that controle the ignition side ok
Best regards Mike
Testimonial: "Thanks I will give it a shot. I don't think it's firing though "
this is for the fuel system, relay for the injector is nearly the same.
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