Hey guys, this is sort of a general question about electrical maintenance. I’ve got some wires that are going bad in my 1996 Mercury Mystique 2.0L Zetec automatic (not that that’s too relevant). Anyway, I’ve got some wires with cracked insulation and exposed copper (specifically the ones leading to the ECT sensor and temperature sending unit). I’ve patched them up temporarily with electrical tape, but I’d like to splice in fresh wire. Anyway, I’ve got a few questions about how to go about this:
1: how do I determine the gauge of the wire? I’m tempted to just cut one, strip it, and measure it with a wire gauge tool, splice it temporarily, drive to the store, buy wire, and splice it correctly. Does that seem like an alright course of action?
2: What sort of splice do you guys use? Is one of the two-ended crimp-on splices going to hold up with all the heat right next to the exhaust manifold? I should really own a soldering iron; should I go ahead and buy one for this job?
3: dialectric grease in the crimp or not?
4: how close to the connector at the end of the wire should I put the splice? I’d like to get rid of as much of the old rotten wire as possible, but I also cannot find the right type of new connector with a pigtail to replace the whole length.
I hope these questions aren’t too basic or annoyingly novice. I know how finicky auto wiring can be, though, and I don’t want to mess it up. If I were repairing a lamp I wouldn’t be asking so many questions, but this is my baby.
Anyway, I appreciate any advice you guys have, either in answer to my questions or in general about auto electric repair (i.e. what I should avoid doing to prevent catastrophe). Thanks,