Just sharing. Hopefully this will help others. If I find I have made a mistake I will edit later.
My Centech harness has a connector with letters. I will note the letter, wire designation and then the color of the turn signal switch wire. I installed a brand new turn signal switch purchased from Tom's Bronco Parts. None of the three color combinations noted in the Centech instructions matched the new switch wire colors, so I ended up ohming the switch to figure out where to connect the wires.
P - Stop switch - Green
N - Passenger stop light - Orange
M - Driver stop light - Green/red stripe
L - Turn flasher - Blue
J - Right front turn - White/blue stripe
H - Left front turn - Green/white stripe
D - Horn Power - Yellow (fat wire)
E - Horn (to the horn) - Blue/white stripe
Notes:
12v DC power is supplied to the horn from the steering wheel horn button. Mine is a 1973 and that year doesn't have a horn relay. I wanted a relay, so wired in one with one side of the relay coil grounded and then fed the other side of the coil with the yellow horn wire in the Centech harness. I found out after the fact that the Centech harness does have a relay, but I would need to modify my column, steering wheel, so that one side of the steering wheel was grounded. I didn't want to change my stock configuration in the column, so opted to install a relay out at the horn. Works fine and my column remains as a 73 would be configured.
L is the feed from the flasher to the lights when turning left or right. L is going to one of the center terminals on the turn signal switch. At each end of the turn signal switch is a front and back light, but for different sides of the truck. So when you are turning right, one end of the switch contacts to flash the front light and at the other end of the switch (opposite side) contacts to flash the rear light on the right side. This little tid bit helped me figure out how to land the wires.
I have notes at home of where the wires of the switch connect on the switch itself. I will edit later and put that in, which once I had ohmed those it really helped me to figure out where wires went.
My Centech harness has a connector with letters. I will note the letter, wire designation and then the color of the turn signal switch wire. I installed a brand new turn signal switch purchased from Tom's Bronco Parts. None of the three color combinations noted in the Centech instructions matched the new switch wire colors, so I ended up ohming the switch to figure out where to connect the wires.
P - Stop switch - Green
N - Passenger stop light - Orange
M - Driver stop light - Green/red stripe
L - Turn flasher - Blue
J - Right front turn - White/blue stripe
H - Left front turn - Green/white stripe
D - Horn Power - Yellow (fat wire)
E - Horn (to the horn) - Blue/white stripe
Notes:
12v DC power is supplied to the horn from the steering wheel horn button. Mine is a 1973 and that year doesn't have a horn relay. I wanted a relay, so wired in one with one side of the relay coil grounded and then fed the other side of the coil with the yellow horn wire in the Centech harness. I found out after the fact that the Centech harness does have a relay, but I would need to modify my column, steering wheel, so that one side of the steering wheel was grounded. I didn't want to change my stock configuration in the column, so opted to install a relay out at the horn. Works fine and my column remains as a 73 would be configured.
L is the feed from the flasher to the lights when turning left or right. L is going to one of the center terminals on the turn signal switch. At each end of the turn signal switch is a front and back light, but for different sides of the truck. So when you are turning right, one end of the switch contacts to flash the front light and at the other end of the switch (opposite side) contacts to flash the rear light on the right side. This little tid bit helped me figure out how to land the wires.
I have notes at home of where the wires of the switch connect on the switch itself. I will edit later and put that in, which once I had ohmed those it really helped me to figure out where wires went.
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