- Dec 18, 2022
- Reaction score
I inherited this truck from my father, Ive had a couple other suburbans before but none with the 7.4l. this one has a western plow and runs great (for the most part) until it randomly blows the ECM1 fuse under the hood. After it blows, I would replace it and the truck would start right back up and run fine. I eventually bumped up the fuse amperage and now I l have replaced it with a U shaped wire connector and hope it hasnt damaged something else as a result..... Any ideas as to why this fuse wouls blow in the first place? Ive replaced all battery cables with 1 gauge cable for both batteries and cleaned and dielectric greased all contacts in starting and charging system. Any help is greatly appreciated.