Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 4 to 3 wire taillights
View Single Post
  #3 (permalink)  
Old 09-24-2013, 04:55 PM
vicrod's Avatar
vicrod vicrod is offline
life is a ride

Last journal entry: 2014
Join Date: Nov 2005
Location: Telford, PA
Age: 77
Posts: 1,539
Wiki Edits: 0

Thanks: 3
Thanked 99 Times in 94 Posts

The trailer lights are wired in parallel with the towing vehicle tail lights.
If the trailer adds too must load (not likely) just replace the trailer bulbs with LED and replace the TS flasher with an LED flasher.
Those diagrams won't work because the TS switch in the towing vehicle controls the brake light circuit.
Typical problem with trailers is a poor ground. This causes all kinds of strange things. Make sure the trailer has a good ground to the towing vehicle.

Reply With Quote