hey there. i want to know if i can wire my heated grips (aftermarket) into othe lighting coil? if not how do all the 340 enticers wire there grips? into the lighting coil? or do they have there own dedicated coil?? please help!!!

Assuming you have Hot Grips or similar and your lighting coil output when working correctly is adequate, just follow their mounting directions. However, since you say you are having issues with dim headlights, I would resolve that issue before complicating things adding heated grips. Check your grounds and voltage regulator, as well as for any chafed wiring. If all that is good, your lighting coil may be going out. Without adequate lighting coil output, your grips will not get warm and your headlight will be even more dim.

Not sure about the heated grips, but just in response to the dim headlight. Mine is dim as well until the engine revs up, then it is fine. I think this is normal for our sleds. I've got a 91 Phazer.

Its normal for them to be less bright at idle, because the output from the lighting coil is low, until the revs pick up.