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Join Date: Aug 2011
Location: Monticello, IL
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I had a recent issue with a DDM tuning kit. My relay harness melted. It first blew the 20amp supplied fuse. I installed a 30 amp fuse and all worked well for that night. I noticed a few days later my passenger side wouldn't ignite, but drivers worked fine. That's when I tore in and found the melted harness. My guess is a malfunction that caused the wires to heat up and the larger fuse I installed. The 30 amp fuse never blew even with the harness melted together. I've always seen the kits come supplied with a 30 amp fuse though, maybe this latest harness wasn't built with the right wiring to support a 30 amp fuse.
Er, the larger fuse wasn't the problem...the fuse is for protection in the event of a short or excess current draw. Whenever a properly-sized/supplied fuse blows that should be a sign of a problem, not a sign that you need a bigger fuse. A larger fuse due to an electrical issue is a great way to cause damage, as you found out, or even cause a fire.
DDM's kits seem to have been going downhill for at least a couple of years now based on what I've seen, not that I'd consider any inexpensive retrofit to be a good idea. They used to sell a quality kit, but like a lot of small-ish vendors their growth resulted in them having to cut corners and use cheaper components to meet demand.
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