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2004 GMC Envoy turn signal problem

Tiny
JOHNSONHO
  • MEMBER
  • 2004 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I have a 2004 GMC Envoy that the right turn signal blanks fast. I have verified the bulbs and fuses. The bulb do not turn on at all and I'm guessing that why it blanking fast. I like no power is coming to the shocket. The left turn signal work correctly.
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Tuesday, January 18th, 2011 AT 8:49 PM

8 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Replace bulb 1st 'Check wiring harness and socket
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Tuesday, January 18th, 2011 AT 9:15 PM
Tiny
JOHNSONHO
  • MEMBER
  • 8 POSTS
I have replace bulb. How do I check the wiring harness and socket
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Tuesday, January 18th, 2011 AT 9:26 PM
Tiny
BMRFIXIT
  • MECHANIC
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1st need to verify fuse #43 below left rear back seat has battery power. With signal on if not check TAN wire back at the flasher module if yes check Dark Blue wire at the socket NO power. Trace the wire harness and repair the short.
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Wednesday, January 19th, 2011 AT 12:22 AM
Tiny
JOHNSONHO
  • MEMBER
  • 8 POSTS
Fuse #43 is good. So I check for power on the DK BLU wire at the socket and there is no power. I have no diagram to trac the wire harness. Any suggestion.
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Wednesday, January 19th, 2011 AT 6:53 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
This may help
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Wednesday, January 19th, 2011 AT 11:35 PM
Tiny
JOHNSONHO
  • MEMBER
  • 8 POSTS
Thanks for the drawing. It turn out that the front socket bad. Need GMC or replacement part number for socket. Again thank you.
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Monday, January 24th, 2011 AT 5:47 PM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
2004 GMC ENVOY 4.2L 256cid L6 FI (S) DOHC :
Electrical-Lamp & Socket : Turn Signal Lamp Socket

ACDELCO Part # LS259 #88862199 3-WAY FEMALE
SOCKET, FRT SI MKR LP 4 WHEEL DRIVE; OE 12083689, 3 WIRES
SOCKET, FRT SI MKR LP 2 WHEEL DRIVE; OE 12083689, 3 WIRE

ACDELCO Part # LS260 #88862200 3-WAY
SOCKET, FRT T/SIG LP 2 WHEEL DRIVE; OE 12083680, PARK AND TURN SIGNAL LIGHT
SOCKET, FRT T/SIG LP 4 WHEEL DRIVE; OE 12083680, PARK AND TURN SIGNAL LIGHT
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Monday, January 24th, 2011 AT 11:21 PM
Tiny
JOHNSONHO
  • MEMBER
  • 8 POSTS
I replaced the socket and still have the same problem. I checked across the contacts the blue wire go to on the bad one and had an open. When I got the new one I checked across the same contacts and had a short. When I installed the new the blub it was still blinking fast so I remove the bulb and checked across the contacts and now I have an open. What is going on.
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Friday, January 28th, 2011 AT 9:47 PM

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