No brake light after new turn signal switch? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fade94 · 12-01-2005, 01:37 PM

Brake lights and everything else worked with old switch, except the horn and auto cancel. Put in new switch now no brake lights, hazards cause smoke and the turn signal and hazards both flash strange. Fast then slow....
Any ideas? The column is a 67 and truck is a 71. The catalogs show the same switch for all 67-72.

jhow66 · 12-01-2005, 02:12 PM

Check your hookup-wire color to wire color.

fade94 · 12-01-2005, 02:23 PM

The new switch came with and adapter from flat to 1/2 moon. The wire colors on the truck are not the same as the colors on the new switch. The adapter has all black wires.

jhow66 · 12-01-2005, 05:16 PM

How did you go about figureing which wire went where?

fade94 · 12-02-2005, 09:16 AM

The new switch has a flat plug. It came with an adapter going from the flat plug to the half moon. I did not have to hook up any wires. It was a plug and go type of thing. I would move wires if I knew where they are supposed to go.

jhow66 · 12-02-2005, 11:32 AM

OK-did you have any problems installing the new switch? Sounds now like you may have a wire grounded. Check it this way--take ohm meter( unplug harness and check each wire going to switch) and see if you have a circuit (meter moves). If you do that wire is grounded. Let me know.

fade94 · 12-02-2005, 12:16 PM

No problems getting new one in. I have only used my meter for checking current. Where do I hook the probes to check the ohms? By the way, thanks for the help on this. This is the only thing I have left to do to get this thing inspected.

jhow66 · 12-02-2005, 04:04 PM

Just hook one end to a ground and the other to one wire at a time.(set meter to ohms). If there is a circuit (which means wire is grounded somewhere) the meter will move like it does when you touch both probes togather with it set to ohms.
Wires on new turn signal switch should be lined up in plug the same as your old switch to make it work.

fade94 · 12-02-2005, 04:06 PM

Will do. Thanks again for the info.

12-01-2005, 01:37 PM	#1
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	No brake light after new turn signal switch? Brake lights and everything else worked with old switch, except the horn and auto cancel. Put in new switch now no brake lights, hazards cause smoke and the turn signal and hazards both flash strange. Fast then slow.... Any ideas? The column is a 67 and truck is a 71. The catalogs show the same switch for all 67-72. __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

12-01-2005, 02:12 PM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: No brake light after new turn signal switch? Check your hookup-wire color to wire color. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-01-2005, 02:23 PM	#3
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Re: No brake light after new turn signal switch? The new switch came with and adapter from flat to 1/2 moon. The wire colors on the truck are not the same as the colors on the new switch. The adapter has all black wires. __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

12-01-2005, 05:16 PM	#4
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: No brake light after new turn signal switch? How did you go about figureing which wire went where? __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-02-2005, 09:16 AM	#5
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Re: No brake light after new turn signal switch? The new switch has a flat plug. It came with an adapter going from the flat plug to the half moon. I did not have to hook up any wires. It was a plug and go type of thing. I would move wires if I knew where they are supposed to go. __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

12-02-2005, 11:32 AM	#6
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: No brake light after new turn signal switch? OK-did you have any problems installing the new switch? Sounds now like you may have a wire grounded. Check it this way--take ohm meter( unplug harness and check each wire going to switch) and see if you have a circuit (meter moves). If you do that wire is grounded. Let me know. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-02-2005, 12:16 PM	#7
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Re: No brake light after new turn signal switch? No problems getting new one in. I have only used my meter for checking current. Where do I hook the probes to check the ohms? By the way, thanks for the help on this. This is the only thing I have left to do to get this thing inspected. __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear Last edited by fade94; 12-02-2005 at 12:16 PM.

12-02-2005, 04:04 PM	#8
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Re: No brake light after new turn signal switch? Just hook one end to a ground and the other to one wire at a time.(set meter to ohms). If there is a circuit (which means wire is grounded somewhere) the meter will move like it does when you touch both probes togather with it set to ohms. Wires on new turn signal switch should be lined up in plug the same as your old switch to make it work. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer Last edited by jhow66; 12-02-2005 at 04:07 PM.

12-02-2005, 04:06 PM	#9
fade94 Registered User Join Date: Mar 2005 Location: Melissa, TX Posts: 799	Re: No brake light after new turn signal switch? Will do. Thanks again for the info. __________________ 68 short bed driver (71 clip on it now, swapping to 68 when weather cooperates) 67 short step project (will get SWB from the 68) 67 Camaro, #'s matching (my wife's) 03 Dodge Ram 2500 4x4 diesel 5 speed 4.10 rear

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