Hi beam indicator inverted from actual - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davepl · 06-12-2015, 08:33 PM

GMC. When 2 outer headlights on low beam, red indicator on dash. When all 4 go to high beam (foot switch), indicator goes out.

So it's backwards, I just don't know how I got into that situation or what to do about it!

Is there an easy way to get the connector backwards at the foot switch, or any other kind of common cause for this?

I do have 4-headlight HID, but am loathe to say it since it'll get blamed. In that case, let me back up and say the green and brown wires are also inverted, so it's before the headlights themselves.

**kwmech** · 06-12-2015, 08:34 PM

Swap the wires on the hi-lo switch

cdowns · 06-12-2015, 10:21 PM

or u can swapout the wires from the headlights

franken · 06-12-2015, 11:16 PM

The foot switch on the floor gets flaky. Try cycling it 20 times and see if it helps.
Unless the problem comes from changing wiring...

davepl · 06-13-2015, 02:08 PM

Now I'm totally confused. Here's what I did.

- Verified that the foot switch alternates legs (green v brown) when pushed, which it does
- Verified that shorting the blue supply wire to brown does high beams
- Verified that shorting the blue supply wire to green does low beams

Dash indicator still backwards. So as a dirty hack I swapped the green and brown in the connector. That swapped them, but the DASH IS STILL INVERTED.

I don't get it.

06-12-2015, 08:33 PM	#1
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Hi beam indicator inverted from actual GMC. When 2 outer headlights on low beam, red indicator on dash. When all 4 go to high beam (foot switch), indicator goes out. So it's backwards, I just don't know how I got into that situation or what to do about it! Is there an easy way to get the connector backwards at the foot switch, or any other kind of common cause for this? I do have 4-headlight HID, but am loathe to say it since it'll get blamed. In that case, let me back up and say the green and brown wires are also inverted, so it's before the headlights themselves. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

06-12-2015, 08:34 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,458	Re: Hi beam indicator inverted from actual Swap the wires on the hi-lo switch

06-12-2015, 10:21 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Hi beam indicator inverted from actual or u can swapout the wires from the headlights __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

06-12-2015, 11:16 PM	#4
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,067	Re: Hi beam indicator inverted from actual The foot switch on the floor gets flaky. Try cycling it 20 times and see if it helps. Unless the problem comes from changing wiring...

06-13-2015, 02:08 PM	#5
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: Hi beam indicator inverted from actual Now I'm totally confused. Here's what I did. - Verified that the foot switch alternates legs (green v brown) when pushed, which it does - Verified that shorting the blue supply wire to brown does high beams - Verified that shorting the blue supply wire to green does low beams Dash indicator still backwards. So as a dirty hack I swapped the green and brown in the connector. That swapped them, but the DASH IS STILL INVERTED. I don't get it. __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible



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