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Wiring Heated grips

1K views 4 replies 2 participants last post by  Alex_V 
#1 ·
Actually should I say re-wiring heated grips. The bike came with a set that is not exactly wired to my liking. It's a crappy grade switch all wrapped up with electrical tape, and four wires that come off the grips. There is black and red, and green and white wires that come out.

So I have red and black go into the fuse box, and grips work just fine. What do you do with green and white wires? I am guessing they are for a high heat setting, but which one is positive and which one is negative?

Any thoughts?
 
#4 · (Edited)
OK. You say you have four leads ... Black, Red, Green & White. They form two pairs as wired: R&B G&W

Figure out which wire from R&B is ground (should be black but if it is kludged all bets are off).

Get a multimeter and check the resistances between pairs. I'd check check all 6 pairs to be thorough but you just need to check the other three against ground. Then you can figure out how to wire it.

One scenario is the R&B pair is independent of the G&W pair (infinite resistance for inter pairing)
This means there are two independent sets of coils. To wire them up just connect one of G / W pair to the ground wire of the R&B pair and replace the switch with a DPDT Center off that lets you power the GW coil as well as the R&B.

If all four leads are interconnected then there's one ground and three different heat levels. Which is hottest? Unplug them and get a couple of 1m wires to jump directly from the battery to the grips' leads find how much heat each gives. Then you need a special switch that turns on 3 different leads.

If either G or W has infinite resistance from all of other three - then the grips are broken, just buy new ones (you'll be happier).
 
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