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Title: dim lights on towed
Post by: wayne m on October 31, 2021, 11:19:08 am

could the roadmaster diode that I have to prevent feedback to
the motorhome be the reason for dim tail and brake lights
on my tow vehicle? remember no dumb questions

Title: Re: dim lights on towed
Post by: wolfe10 on October 31, 2021, 11:21:15 am

Yes, most standard diode loose about .7 VDC.

There are more efficient ones/less voltage loss to heat, but more $$.

Title: Re: dim lights on towed
Post by: Pierce & Gaylie Stewart on October 31, 2021, 11:33:35 am

A bad ground has been the culprit many times. If the lights are LED, the intensity should stay about the same over a fairly broad range of voltages.

Pierce

Title: Re: dim lights on towed
Post by: dsd on October 31, 2021, 12:48:21 pm

Check the voltage before and after the diode. FYI the diode can be doubled up in parallel and will reduce their resistance by 50% so your .7 of a volt will be reduced by almost half to .35 loss. If you are using a turn signal converter they too also have a loss across them. Pierce is spot on in regards to a bad ground.
Scott

Title: Re: dim lights on towed
Post by: oldguy on October 31, 2021, 04:49:57 pm

I would go with Pierce, bad ground as the brake lights and tail light are different
circuits.

Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: wayne m on October 31, 2021, 11:19:08 am