Chevrolet Repair: tow lights, trailer plug, signal lights

Question
trying to wire tow lights (from jerr-dan roll back tow truck) to 1995 chev 3/4 ton pickup. can get park and brake lights to work  but when i connect right or left signal light wires  both signal lights blink.

Answer
Hi John.... left and right signals and brake are on the same circut...just wire your tail lights and then signals and ground. are you using a trailer connector. or are you trying to hard wire in to the lights.on four wire trailer plug the white is the ground. then the last 3 wires are left signal and brake, right signal and brake and tail lights.hope this helps