J-Herkel
TYF Newbie
- Joined
- Oct 19, 2024
- Posts
- 18
- Reaction score
- 24
Alright so.. my jumper wire worked. It cranked. Thank you Lord!
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Your middle pic shows a trace that has acted like a fuse because the current passing through it exceeded its rating. So that trace heated up excessively and melted just like a fuse element does. You can lightly scrape the green color off of the trace on both good sides of the fused trace and install a jumper there by soldering a wire across the gap.So I went back again this morning and did some continuity tests from the top of the board, starter relay terminals, to the bottom of the board terminals that plug into the banks of wires that run to the other components. Relay terminal 87 (F1)(to 40amp starter fuse) has continuity and is good. Relay terminal 86 (C5)(to ECM starter relay) has continuity and is good. Relay terminal 30 (A)(hot at all times/main power) has continuity and 12v and is good). Relay terminal 85 (N5)(ground to engine block) has no continuity to the N5 terminal on the back of the board. I ohm tested the wire it plugs into under the fuse box on the vehicle, and it tested good for a ground. Since the computer is sending the crank signal, it's reading the key in the crank position, no theft control module is active, the starter jumped off the relay and worked, my only thought that it can be is the ground (N5) on the board. Without the ground it won't activate the relay. And I wasn't getting any clicking in the relay when we were trying to crank it yesterday. I'm attaching more pics of the "bubble". By the way, I also checked the N5 (ground) circuit which also leads to the ground terminal on the "run/crank" relay and I had continuity there so it does seem like there is a broken connection between the N5 plug on the bottom and the ground (85) terminal for the starter relay.
I would reposition the wire on the top right where it is up against that stab so it doesnt rub through the insulation later on down the road. Add a couple dabs of silicone gasket maker or even caulking to the wire to glue it down on the board and in place. That wire is plenty large enough for the normal current levels it will be seeing.Since the starter relay and the run/crank relay share the same N5 ground on the bottom of the board and the run/crank N5 seems to have continuity and the starter doesn't, I added a jumper wire. I'm going to see if it works. If so, this will be my permanent fix. This jumper is just a ground wire.