turn signal/ brake light relay

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brice71

Member - Posts: 2

Joined: August 22, 2014

Location: West Virginia, United States

Posted: August 22, 2014 at 8:32 PM / IP Logged

I need to know if anyone could help me narrow a brake light problem I'm having with a 1994 cutlass supreme. Here goes... I only have the left brake light coming on when I hit the brake pedal. When I turn the left signal on while holding the brake the right side brake lights up. When I go to the left signal and back to the off position both brake lights go out until I activate the turn signal again. The 3rd brake light stays on the whole time the brake pedal is depressed. Could it be the brake/turn relay or something else?

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: August 23, 2014 at 10:23 AM / IP Logged

Measure the grounds each side, ground wire to battery should be less than 3 ohms, OR you have a bad/wrong/pins wrong way bulb.

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davep.

Gold - Posts: 641

Joined: May 27, 2011

Location: California, United States

Posted: September 09, 2014 at 11:44 PM / IP Logged

I doubt this guy will be back, but he has a bad turn signal switch in the steering column.

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: September 10, 2014 at 1:46 AM / IP Logged

Oops, sorry me trying to be clever with no specialised knowledge of that vehicle.

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: September 10, 2014 at 4:35 AM / IP Logged

LOL...

Yeah, normally a GND issue but I suspect this is a single filament combined flasher/brake bulb in which case it's a switching problem. (Or maybe a LED conversion.)

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: September 10, 2014 at 4:39 AM / IP Logged

It gets even more complicated post 2000 when the Germans went to symmetric pins on those bulbs.

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brice71

Member - Posts: 2

Joined: August 22, 2014

Location: West Virginia, United States

Posted: September 10, 2014 at 6:18 AM / IP Logged

Thanks, I'll look to see if the bulbs are correct.

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turn signal/ brake light relay

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