How would you wire a 4 wire turn signal

[BobT-47P15]

I bought a Chicago Lamp 9000, self cancelling turn signal flasher unit

on ebay the other day.

It turns out to have only four wires.

The last one I got of same brand had 7 wires, which is what I needed

for my system. It's on the car and working fine.

This one may end up just being good for spare parts.

Doesn't seem like four wires would quite enough......

Anyone have a diagram?

[oldodge41]

I don't have a diagram but I could see it possibly being:

1. Pos or neg from flasher

2. Rt signal

3. Lt signal

4. Pos or Neg opposite of #1 to complete circuit for indicator on unit

The pos and neg thing would depend on whether you were pos or neg ground. Would have to spend some time with an ohm meter to determine which wire is which.........Tim

[Don Coatney]

Have you used an ohm meter to see what each wire does?

[48P15Annie]

I have the same one. It was added by the original owner in 1966. I'll take a look when I got home next and see how many wires it has. It was re-wired in the back of teh car in the mid 1980's.

[bamfordsgarage]

This diagram off Google may help — your wire colours may be different but the components to which they are connected ought to be the same. X, L & P identify the terminals on the flasher units. A little experimentation would make things clear.

I installed a similar 4-wire turn signal switch on my D25. It works just fine, although there is no provision to use the rear turn signal bulbs for brake lights. An additional DPST switch can be wired into this setup to provide 4-way flashers through the signal lights..

[BobT-47P15]

That seems to make sense......using one wire for a pair of lights

instead of one wire for each one.

[55 Fargo]

This diagram off Google may help — your wire colours may be different but the components to which they are connected ought to be the same. X, L & P identify the terminals on the flasher units. A little experimentation would make things clear.

I installed a similar 4-wire turn signal switch on my D25. It works just fine, although there is no provision to use the rear turn signal bulbs for brake lights. An additional DPST switch can be wired into this setup to provide 4-way flashers through the signal lights..

Or you can wire into the circuit 2 6/12 V DC-DPDT relays, to incorporate, the rear tail lights as brake lights as well.

The relays will allow the signal lights to power on the the indicated side, while at the same time it cancels the brake light to that side.

This circuit gives the rear of the car, all 3 lights as brake lights, and allows the signal circuit to work, when needed.

You can also wire in an additional relay to create 4 way flashers.......Fred

[Jim Saraceno]

So.... How does it cancel itself?

[bamfordsgarage]

Or you can wire into the circuit 2 6/12 V DC-DPDT relays, to incorporate, the rear tail lights as brake lights as well.

The relays will allow the signal lights to power on the the indicated side, while at the same time it cancels the brake light to that side.

This circuit gives the rear of the car, all 3 lights as brake lights, and allows the signal circuit to work, when needed.

You can also wire in an additional relay to create 4 way flashers.......Fred

Very clever. I'll probably do that to mine when it's back home. Thanks for the tip.

[BobT-47P15]

So.... How does it cancel itself?

Jim......the rubber wheel presses against the back edge of the steering

wheel. Turning the wheel causes the rubber one to turn and cancel

the signal. Works fairly well, but not perfect.

I did discover that for a P15, at least, you need a signal with the

rubber wheel on an angle. There are others where the wheel

sticks straight out.....did not mesh with my steering wheel.

[55 Fargo]

Very clever. I'll probably do that to mine when it's back home. Thanks for the tip.

I have 2 schematics, 1 from a Forum Member, and 1 from a local Gent, will share them both with you.

[BobT-47P15]

Thanks for the input guys.

That helps.

I just couldn't imagine how to wire it at first.

Will need to test to see which wires do what.

I bet it actually will be OK.

Seller didn't know if it worked or not.

The simpleist way to use it would probably be if you

added extra lights for turn signals, as seen on some

old cars. That way you wouldn't have to get into

the part about brake lights, etc.

One more learning experience with old cars......

[Plymouthy Adams]

remember Bob. using a three wire flasher will give you indicators on the dash that are on when the flasher is open and off when the flasher is closed...opposite of the outside lights..you just use this wire direct from the flasher..

[T120]

Bob,You probably have enough info on the 4 wire turn signals - but here's more from a Chrysler Canada manual (1942-1946) covering all models including the P15

[

[BobT-47P15]

Thanks Ralph.