Larry johnson Posted September 21, 2011 Report Share Posted September 21, 2011 I bought my buddy's '67 520 over the weekend. He needed money and I did'nt want to see anyone else get it. He had the motor rebuilt and put a new Weber on it . The engine number matches also for whatever that's worth. The brake lights were not working so I checked the circuit and they get juice. I bought a new switch and put it on and still no lights. Any advice? Quote Link to comment
DanielC Posted September 21, 2011 Report Share Posted September 21, 2011 I believe 520 trucks have power to the brake light switch all the time. The switch is hydraulic, and on a "T" in the brake lines. Find the switch. pull the wires off it, and jump them. Brake lights on? if no, check brake light bulbs. If bulbs are good, check grounds on taillights. Then check other connections between the brake light switch, in the wire harness, back to the taillights. Quote Link to comment
Larry johnson Posted September 21, 2011 Author Report Share Posted September 21, 2011 I put the female bullet connectors on fork tines and the lights go on. Installed a new switch and still get nothing. Quote Link to comment
DanielC Posted September 21, 2011 Report Share Posted September 21, 2011 I think you have found a defective switch. Quote Link to comment
mklotz70 Posted September 21, 2011 Report Share Posted September 21, 2011 the hydraulic switches are slow to react. You can make a simple bracket and mount up a switch from a 620....just extend the wires from the firewall switch. Quote Link to comment
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