Tundra blowing bulbs. Help!!!!!!!
Posted: Mon Dec 11, 2006 7:36 pm
A co-worker has a Tundra II that will not regulate the voltage on the lighting circuit. He bought it used. Someone prior has installed hot-grips. Everything worked fine at first.
He noticed one day his hot-grips were extremely hot to the point it melted the hand grips. It also blew the only two bulbs on the machine. (head lamp & tail)
He fisrt replaced the voltage regulator and hot grips: No help.
I gave him a hand and look all the wiring over. We pulled the seat, gas tank & air box. We noticed the butcher job on some splice work. We inspected & cleaned up all the hacked work. The Voltage Regulator (VR1) is a two wire type and two ground wires from the chassis are grounded on the VR1 mount bolt.
I ohmed out the hot-grip system and they check out and are not grounded to the chassis. I also checked continuity between the chassisand VR1 case. (less than 1 ohm) I checked for lighting supply lines shorted to the chassis- all good.
We started the engine up and get 14 volts (A/C) at idle. When the RPM starts to climb the voltage ramps up th 40 VAC right away.
I convinced him he had gotten a bad regulator. Tonight he installed yet another (new) regulator only to have the same problem.
Does the CDI have anything to do with the lighting? I know the 2000 and up Yammies do.
Any suggestion are appreciated.
He noticed one day his hot-grips were extremely hot to the point it melted the hand grips. It also blew the only two bulbs on the machine. (head lamp & tail)
He fisrt replaced the voltage regulator and hot grips: No help.
I gave him a hand and look all the wiring over. We pulled the seat, gas tank & air box. We noticed the butcher job on some splice work. We inspected & cleaned up all the hacked work. The Voltage Regulator (VR1) is a two wire type and two ground wires from the chassis are grounded on the VR1 mount bolt.
I ohmed out the hot-grip system and they check out and are not grounded to the chassis. I also checked continuity between the chassisand VR1 case. (less than 1 ohm) I checked for lighting supply lines shorted to the chassis- all good.
We started the engine up and get 14 volts (A/C) at idle. When the RPM starts to climb the voltage ramps up th 40 VAC right away.
I convinced him he had gotten a bad regulator. Tonight he installed yet another (new) regulator only to have the same problem.
Does the CDI have anything to do with the lighting? I know the 2000 and up Yammies do.
Any suggestion are appreciated.