240Z Headlight Relay Mod


Posted on Feb 6, 2014

The following is my modification of the Headlight wiring for 240Z`s. I made this modification in order to take the current load off of the Headlight switch and put the load onto two relays, giving more current to the lights at the same time. This circuit is intended to be installed by splicing it into the stock 240Z wiring harness on the right fen


240Z Headlight Relay Mod
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derwell. I used wire colors for the 73 240Z, although I believe they are the same for all years. Find the following wires in the harness between the firewall and the connector in front of the radiator support that the right headlight sub-harness plugs into. The connector is T shaped with three male blades in it: The wire on the left is Red with a Black stripe (RB). In the OE 240Z wiring, this wire is grounded when the low/high beam switch is in the low beam "position". The wire on the right is Red with a White stripe (RW) (on the left headlight). Unfortunately, on the right headlight it is also Red with a Black stripe. From the high/low beam switch it is Red with a White Stripe. In the OE 240Z wiring, this wire is grounded when the low/high beam switch is in the high beam "position". The wire on the bottom is Red with no stripe (R) on the Right headlight, and Red with Yellow stripe (RY) on the Left headlight. In the OE 240Z wiring, these wires go to the left and right headlight fuses.




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