[schlitzman]

Just got a '67 Grand Prix convertible. Car has cornering lamps. Lamps work, but do not get power when directional switch is on, w or w/o headlights on. Is this a switch problem (wrong switch) or something else. I have the '67 Service manual but can't find any reference to cornering lamp wiring. Any ideas/hints would be greatly appreciated.

Thanks,

Schlitzman

[stevep]

Make sure that it has the correct turn signal switch. It should have an extra pigtail w/2 wires coming out of the column. If the switch failed on the prior owner, he may have installed a non cornering light turn signal switch or installed a different column.

[Coach]

+1 Mine had the wrong one when I bought it

[GpFreak]

Do the signals cancel after you turn a corner? The signal switch is a common issue and like Steve said make sure you get one for a cornering lamp car. The switch is bad in my '70 and I've caught myself a couple times now driving with the right signal on, I must be getting old!

[north]

also if the car has been apart for painting you often lose the ground, especially if they got paint on the inside of the fenders, those lamps ground to the body.

Put on the lights and the turn signal with the ignition in run and see if you get 12v at the wire leading to the unit (the same side as the turn signal of course), if you get juice then all that's left is the bulb or the ground. If you don't get juice then its probably a bad or incorrect turn-signal switch or some bad connection somewhere.

[schlitzman]

Thanks all,

The cornering lamps work, as determined by supplying a 12v source. There just isn't a 12v supply to them when the directional switch is applied. Looks like I need to replace the switch if I can't jump a coordinated turn signal voltage.

Is there a special switch I need to get, either a Boyne or GM?

Bruce

[stevep]

Do you have a parts book that you can look at? Do you have a tilt wheel?

I think that it is the Boyne switch and if I remember correctly, it's the red one.

Just to be sure, is the 2 wire pigtail connected to the directional switch?

[north]

Before buying a switch make sure the two extra wires on the switch under the column are connected and that things are wired right at the junction behind the fuse block.

[schlitzman]

Thanks, Steve and North.

Steve, yes, the car has a tilt wheel. Where do I look for the 2-wire pigtail you reference?

North, I'll remove the junction box and examine connections.

Bruce

[stevep]

The pigtail should be right next to the main turn signal switch connector coming down the column.

[gtoric]

Originally Posted by schlitzman

Thanks, Steve and North.

Steve, yes, the car has a tilt wheel. Where do I look for the 2-wire pigtail you reference?

North, I'll remove the junction box and examine connections.

Bruce

With your tilt column, there is a chance that the ribbon harness that runs down the column has the wiring insulation chaffed off the wiring to the cornering lamps. Every time the wheel is tilted, the harness is moved up or down the column. With enough tilt cycles, the harness can be grounded onto the column.

I had a problem with brake light operation, and it turned out to be harness grounding inside the column where the tilt pivoted.

[schlitzman]

I did check the switch and it does have a pig tail. Except, it has three wires, not two. No power from the pigtail when either turn signal activated. I will check for potential short per "gtoric"

Many thanks.

Bruce

[Mike Pemberton]

Had a new TS switch which you can buy at:

SHEE-MAR, INC
POX 179, Longmont Colo 80502 Part# SM 229 GM

Mike at PY rebulit my headlight switch and I seperately grounded the corning lamps back to the harness grounds at the core support where they come out of the headlight harness. Took a bit to figure out what was going on. The grounds are most key as one was working and the other one did not in all sorts of hook up trials.

Need to call please do.

Mike Pemberton
510-501-6299