DC electrical problem with headlights on golf cart

[npd4432]

I recently purchased a golf cart and have installed a set of headlights on it. The headlight kit came with a wiring harness and switch along with the headlights and taillights. The positive and negative leads for the system are connected directly to the battery. So here is the problem and what I have done to pinpoint it. The headlights work fine when the cart is running at low speed but when the motor gets to a higher rpm the lights begin to pulsate. Now I have removed several conponents and have narrowed it down to the voltage regulator. The regulator is working properly as I have tested the voltage at the battery when the engine is not running and when it is. The starter/generator is charging properly. The pulsation begins to occur when the voltage regulator hits high limit and "goes in and out" causing the puslation. What I need to know is there something I could put onto the system to eliminate this like a noise filter or something similar?

The cart is a 2000 Yamaha G16 gas powered and it does have a resistor plug NGK BPR2ES.

 

[foodfisher]

Re: DC electrical problem with headlights on golf cart

Test battery. May be weakening

 

[npd4432]

Re: DC electrical problem with headlights on golf cart

It has a new battery and I have tried one other known good battery with the same result.

 

[dingbat]

Re: DC electrical problem with headlights on golf cart

It sounds like the problem is in your voltage regultor.

I have an EZ-GO gasser and the output of the voltage regulator is rock solid. I have no pulsation in my lights at all.

 

[npd4432]

Re: DC electrical problem with headlights on golf cart

It sounds like the problem is in your voltage regultor.

I have an EZ-GO gasser and the output of the voltage regulator is rock solid. I have no pulsation in my lights at all.

Possibly, I just don't want to go and pay $50.00 plus for a new regulator when it may not fix the problem, as the regulator seems to be working fine with the exception of the pulsation.

 

[dingbat]

Re: DC electrical problem with headlights on golf cart

The voltage regulator should have some sort of a ripple smoothing capacitor shunted across the output of the alternator. I would check to see if this capacitor or one of the diodes in the bridge isn't blown.