Quad Tail Lights? How-To Inside - Page 11 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Appearance > Exterior

Exterior Exterior repairs/modifications

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  #101  
Old 07-20-2010, 04:40 PM
Envoy10 Envoy10 is offline
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2003 GMC Envoy SLT
Black 4.2L I6 AWD
Join Date: Jan 2010
Location: PA
Posts: 280
Envoy- Same? Different?

Are there any differences for the circuit board mod and the relay mod for an Envoy?
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  #102  
Old 07-23-2010, 03:55 PM
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EwingJK EwingJK is offline
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2005 Chevy TrailBlazer LS
Cashmere Metallic U929L 4.2L I6 4X4
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Location: Esterhazy, SK & Sherwood, OR
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Quote:
Originally Posted by Another BlackSS View Post
So I got these relays wired up for quad brakes and turns......I got hyper flashing while using my T/S and applying the brakes, how do you correct this??
When you apply the brakes with the turn signals on, the relays alternate the power supplied from the brakes and turn signal. I experienced this with my setup as well. I removed the relays from the system because I shipped the TB back to the US. It has to go through Customs & DMV inspections, so I went back to stock. When I get the TB back, I'm going to reinstall the relays, but I'm going to draw the power for the turn signals upstream from the flasher module under the dash. Once it's finished and working correctly, I'll draw up a diagram and post it.
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LT Bumper & Fogs, Oil Skid Plate, Bilstein HDs, Quad Head & Tail Lights, LED Hood Lights
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  #103  
Old 08-29-2010, 11:46 PM
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Another BlackSS Another BlackSS is offline
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2006 Chevy TrailBlazer SS (3SS)
Black 6.0L LS2 V8 AWD
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all of my problems were solved by installing to .15 Ohm resistor in my flasher relay. Thanks again for all the info guys!
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  #104  
Old 11-28-2010, 09:46 PM
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Colonel Sanders Colonel Sanders is offline
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2006 Chevy TrailBlazer LS
Black 4.2L I6 2WD
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so if i understand this correctly the middle/signal light will also be a running light when you are driving so all 4 light would be on when you are just driving and it would still function as a blinker too? and the top lights would still be running/brake lights?
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  #105  
Old 11-28-2010, 11:15 PM
50655 50655 is offline
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2003 Chevy TrailBlazer LS
Dark Spiral Gray Metallic 4.2L I6 2WD
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Originally Posted by Colonel Sanders View Post
so if i understand this correctly the middle/signal light will also be a running light when you are driving so all 4 light would be on when you are just driving and it would still function as a blinker too? and the top lights would still be running/brake lights?
That is correct.
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  #106  
Old 02-09-2011, 10:11 PM
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EwingJK EwingJK is offline
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2005 Chevy TrailBlazer LS
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Well, since I returned from my job in Madagascar (laid off again), I finally had some time to work on the Quad Brake & Turn Lights. I connected the brake & turn signal bulbs together. Then I tapped into the turn signal switch upstream of the Flasher Module. I ran the wires through a soft plug in the floor board near the driver's seat, then inside the frame to the rear of the TB. When the turn signal is activated, power is supplied to a Bosch relay for each side as appropriate (left or right). The relay opens the circuit to the brake light. The turn signal downstream of the flasher connects directly to the bulbs, as does the brake circuit. I put a diode on the turn signal circuit to prevent reverse flow to the flasher. Refer to the attached schematic.
Attached Files
File Type: pdf 08-Quad Brake & Turn - PreFlasher.pdf‎ (53.6 KB, 226 views)
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  #107  
Old 06-27-2011, 08:48 AM
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SHILOW SHILOW is offline
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2003 Chevy TrailBlazer LTZ
Summit White 4.2L I6 2WD
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I completed this curcuit board mod and it worked fine until I installed my new LED Brake lights. Now the lights are back to stock. Is there something I can do to get the quad mod to work again?
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  #108  
Old 06-27-2011, 02:33 PM
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SS-LS2 SS-LS2 is offline
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2008 Chevy TrailBlazer SS
Red Jewel Tintcoat 6.0L LS2 V8 2WD
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not quite sure what you have now.....

what does the taillight do now?

LED Bulbs or complete unit (make model of taillight)

did you do the harness and relays change with or without resistors?



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  #109  
Old 06-27-2011, 02:49 PM
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2003 Chevy TrailBlazer LTZ
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I replaced the entire unit with the standard ebay LED tail lights. I'm not sure of the make or model number. I also added 6ohm load resistors to slow the sgnal down. The curcuit boad is still modified but the lights are not quad anymore. I did not modify the harness other than splicing the load resitor in, but the quad wasn't working before I did that.
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  #110  
Old 06-27-2011, 03:33 PM
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SS-LS2 SS-LS2 is offline
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2008 Chevy TrailBlazer SS
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it uses the circuit board?? would you be able to post a pic or describe the connection....

if it uses the CB then it must plug in like a bulb - if thats the case you might want to try and turn the connectors around 180 in socket- sorry i really have no idea how these units hookup - i would have thought since its a complete unit it would not use the CB and just plug into the harness connector
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