Greetings from North Pole, Alaska.
I just picked up a honey of deal in a excellant condition 300 bayou recently. Everything on it is in great shape and works fine, with the exception of the hot grips heated hand grips. Ive gone to hotgrips website, and at the moment it seems everything is wired right. I can detect voltage going all the way to the wire that feeds into the first handgrip (series wired). So the connection is reaching ground anyways. The power source is the wire to plug in the optional 2nd headlight/worklight. Ive tried them on low and high, and when riding so as not to depend on idle. I dont feel no heat. The one weak point im going to check next is the wire that feeds the grips the power, is spliced onto one of the wires going from the switch to the resistor, and hot grips says to solder that connection and not use the cheapo plastic splice, which is exactly what whoever installed these, did.
If anyone has any suggestions Id apperciate it, i do mostly early mornin and evening riding, and it can be nippy even in the summertime, up here that is anyways.
Thanks in advance for any input.
I bid you all a good day.

 

All i can say is congrats on the purchase and BRRRRRRRRRRRRRRRRRR Alaska has gotta be cold. But i will bet the fishing is awsome?

 

Your on the right track I think. Soldered connections are prefered, the plastic connectors could shake loose and be intermittant, even the crimp style. My favorite automotive connection is a crimp style, soldered with heat shrink over it. Start with all connections, and re wire all of them, even if they "look" good. Then see if they work. im cold just reading about Alaska.....