Cummins grid heater spiking voltage?
My trailer is lightly used and I have already had to replace the LED brake and running lights. Today, I replaced all my amber LED marker lights which were obviously smoked. I have an 04 Ram and am w...
Forum Discussion
Durb wrote:
...
When I cold start the truck the grid heater will cycle causing the headlights to dim and the fan motor to slow. In a minute they will speed up and brighten. This is from the outset even with new batteries. Would this voltage fluctuation have an impact on my trailer lights?
...
When it's very cold outside, my truck's alternator can apparently crank the voltage up over 15V. Our car went over 15.3V this winter. This is measured at the cig lighter inside.
Perhaps the original LED lamps can't handle that high a voltage, if it is appearing on the trailer wiring?
