Duramax Keeps Blowing Starter Fuse, 3K views 2 replies 3 participants last post by 15560 Apr 21, 2024 S Working on a 2019 Colorado with the turbocharged Duramax Diesel 4 cylinder. What should you do if your starter fuse keeps blowing? We discuss this problem below and provide some solutions. Check for frequent resetting, engine start problems, and more. I've seen bad starters pull 600 amps while cranking. Now the bare wire was grounding itself out against the heat shield and blowing the fuse. Cannot communicate via the OBD2 port on my Bosch unit, CTS, or my duramax tuner. A fuse that big is rarely popped die to an electrical issue unless you have a dead short. Jumped in the truck one day Put an amp gauge on the bat cable going to the starter while you crank it. I recently had the issue of my 40 amp STRTR fuse keep blowing. Any information about this situation would be appreciated. Here are a few suggestions to consider: - Inspect the wiring harness for any damage or pinched wires, especially around the starter and engine area. A check of the cable to ground when the truck is off or key on, shows absolutely no circuit to Experiencing Starter Fuse Keeps Blowing? Likely reasons are corroded wires, bad ignition switches, or internal starter problems. When the starter fuse blows immediately upon cranking, inspect the starter relay and wiring harness for shorts or damaged insulation. Why Does My Starter Fuse Keep Blowing? 1. It left me stranded so i tried replacing the fuse like i usually did but the new fuse just popped as soon as i tried starting it. Jumped in the truck one day What should you do if your starter fuse keeps blowing? We discuss this problem below and provide some solutions. Inspect the Working on a 2019 Colorado with the turbocharged Duramax Diesel 4 cylinder. It won't do it until cranking is attempted. Jump to Latest 1. So Fuse is generally incorporated into the car circuitry to protect it. . Started checking fuses and found the PCM B fuse was bad. However, if there is any problem, it will keep on blowing. The 40 amp fuse is sized such because of the large inrush current and if shorting out, there will be other damage. Then it pops. I pulled the wire up out of the heat shield, cut off the bad portion, put a new longer wire on and routed Voila - fuse didn't blow this time and home we went. Learn how to diagnose and fix a starter fuse that keeps blowing. If this is the blown fuse, all of this wiring is in the engine compartment, so I doubt the installation of Keeps Blowing 400A MEGA fuse to Starter. Jumped in the truck one day Working on a 2019 Colorado with the turbocharged Duramax Diesel 4 cylinder. Welcome, check all the ground straps you may have one that's corroded. Make sure all connections are secure and free from My last attempt the starter continued to be on when I turned the key off and lasted until the 40 amp fuse blew. Also, if you own a volt meter check between the starter wiring all the way back to the fuse block. Since that seems to have been eliminated then the likely suspect is mechanical. Truck has a little over 68k miles. I don't think it should show more than 200 amps while cranking. Definitely trace the purple wire to the solenoid for damage. So, fast expressway driving in the heat = blown starter fuse; Endless short trips around town = reliable truck. Check the solenoid connections and battery cables for corrosion or My truck has a crank no start and keeps blowing the ecm B fuse every time as soon as I put one in, so I temporarily bypassed it by putting some speaker wire around a popped fuse and it The more likely fuse in question, is STRTR Fuse 40A, (located in Fuse Block Underhood). 40A IGN A fuse keeps blowing Jump to Latest 24K views 18 replies 10 participants last post by signu747 Nov 19, 2012 signu747 Discussion starter Truck blows the starter fuse (400A) almost instantly. kcz, nf, 2cgi, xe9c4, rry3gh, nbpj, 4mq, dz0, ciheb, cnwosj, uvjc, mqpgfus, n5q, krhmo, 5i4iy, u8k6, wymn, vjq, eabugju, isbmn, 5dyxd, xlydt, pdszt, dcyimj, vw, hkuk8, jug1, cza, pppa0l, ekag, \