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  1. #1
    ScoobyDoo82's Avatar
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    How to install an electronic turn signal flasher in your first gen Wbody

    Well I just did this mod in my Grand Prix today. Its significant if the slow blinking of mechanical flasher bother you, or if you just want to modernize your car a bit.

    You only need 4 things... head to the junkyard and find the flasher relay along with the wiring harness out of a U-body van** (Venture, Trans Sport, Montana, Silhouette), two male crimp connectors, and one eyelet connector.

    First, take your flasher relay and crimp (or solder if you have connectors that accept it) the two male end connectors to the blue and purple wire. Do the same with the black wire, only with the eyelet.

    Second, locate the mechanical flasher in your car (near the steering column almost at the fire wall on 88-93 w's) and remove it. Then take the harness and plug in the male end connectors, the wires are the same color so just match them up.



    Third, find a suitable ground to bolt the black wire up to. I used a small ground just above the ALDL connector.



    Last but not least, find somewhere to tuck the flasher (the original location works if you have enough length on your ground wire)

    Enjoy your faster blinking, more modern sounding turn signals!


    **The flasher relay of the u-body vans is located to the left (sitting in the drivers seat) of the steering column. Remove the knee panel and lower carpeted panel and look up. You'll see a block with blue connectors in it, look just past that and you'll see the flasher. Also, not ever U-body has the flasher in the same spot, so if you don't see it there, you're not going nuts. Unfortunately, if its not in that location, I don't know where else they like to hide them, so I'd just move on to another van.

    keywords for google search: how to install electronic flasher relay 1988 88 1989 89 1990 90 1991 91 1992 92 1993 93 Pontiac Oldsmobile Buick Chevy Chevrolet Grand Prix Cutlass Cutless Supreme Lumina
    Last edited by ScoobyDoo82; 05-24-2012 at 08:39 PM.
    Spencer- Resident SBX enthusiast

    //89 Grand Prix LE - 3.1L V6 - 83k\\~~//84 Fiero SE Indy - 2.5L I4 - 77k\\

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  3. #2

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    Thanks for the write-up. This should be made a sticky. And also, this will completely eliminate the need for any resistors soldered in series with any type of LED turn signal bulb swap. (I can't believe people are still going that route instead of using an electronic flasher).
    Just here for the pizza

  4. #3
    ManicMechanic's Avatar
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    Hmmmmmm...

    Jay
    "Eh, ya know somethin' Jimmy...It's one thing to understand how to bolt aftermarket parts to your car...It's another thing entirely (opens exhaust on GN) to understand how they all..work..together!"

    I may not have a W anymore, but my trucks have a lot of w-body parts.
    THE ANSWER TO 1984 IS 1776.

  5. #4
    RobertISaar's Avatar
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    i'm kind of surprised there are no electronic versions that will readily adapt to the ones W-bodies use...
    King of Code
    1995 Monte Carlo LS 3100, 4T60E... for now, future plans include driving it until the wheels fall off!



  6. #5
    ScoobyDoo82's Avatar
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    Well this kind of does... it doesnt hack up the wiring harness if you use the male connectors, easily reversible if need be.
    Spencer- Resident SBX enthusiast

    //89 Grand Prix LE - 3.1L V6 - 83k\\~~//84 Fiero SE Indy - 2.5L I4 - 77k\\

  7. #6
    ManicMechanic's Avatar
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    Note to self: One for Indy and one for Blazer...
    Jay
    "Eh, ya know somethin' Jimmy...It's one thing to understand how to bolt aftermarket parts to your car...It's another thing entirely (opens exhaust on GN) to understand how they all..work..together!"

    I may not have a W anymore, but my trucks have a lot of w-body parts.
    THE ANSWER TO 1984 IS 1776.

  8. #7
    ScoobyDoo82's Avatar
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    Super easy install... I got home at 7:45 from the junkyard, had to leave by 8:00 to make it to the movies on time, and did. It probably helps that none of the trim panels were bolted on, I just had to yank them off :P
    Spencer- Resident SBX enthusiast

    //89 Grand Prix LE - 3.1L V6 - 83k\\~~//84 Fiero SE Indy - 2.5L I4 - 77k\\

  9. #8
    white4d96's Avatar
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    My GPSE had a plug-and-play electronic flasher in it when I got it...

    Also, random tidbit on the thermal flashers, if they're slow, they're old. Toss and replace. I got a new one for my hazards (same one) for $3.
    http://i475.photobucket.com/albums/rr118/jfleck91/untitled-1.jpg


  10. #9
    virtuetovice's Avatar
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    Sweet post! Sticky?!?
    this IS a General Motors product and the general rule is that nothing should make actual sense.
    Quote Originally Posted by pwmin View Post
    who knew a pansy-ass 2.8L V6 would sound so glorious
    This message was sent from my 2012 Cadillac CTS

  11. #10
    1988PhantomFE3's Avatar
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    What improvement does this occomplish friend?

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  13. #11
    ScoobyDoo82's Avatar
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    Its not a huge improvement but they're more reliable than mechanical flashers (or so I've heard, this is the first time ive put one in my car). I like to add modern touches to my car and since I got the flasher for free I figured why not.
    Spencer- Resident SBX enthusiast

    //89 Grand Prix LE - 3.1L V6 - 83k\\~~//84 Fiero SE Indy - 2.5L I4 - 77k\\

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  15. #12
    Arrive Alive tornado_735's Avatar
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    Even easier and better.

    Use a hazard flasher relay. Fixes slow blinker syndrome. Only problem I forsee is that it doesn't tell you when a bulb is out.

    It's plug and play, no wiring required.

    2006 Pontiac Grand Prix - 115k
    2001 Mercedes E320 4matic Wagon - Too many miles
    1995 Range Rover 4.0SE V8 - 127k
    "...then I saw that there was a way to Hell, even from the gates of Heaven..."

  16. #13
    Arrive Alive tornado_735's Avatar
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    Oh yeah, the other good thing about the hazard flasher relay is that it flashes the same speed even with LEDs.

    2006 Pontiac Grand Prix - 115k
    2001 Mercedes E320 4matic Wagon - Too many miles
    1995 Range Rover 4.0SE V8 - 127k
    "...then I saw that there was a way to Hell, even from the gates of Heaven..."

  17. #14
    base93lumina's Avatar
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    So these first gen Lumina's dont use the traditional 552 style flasher? I thought they did? If it was the case just go buy an EL-12 electronic flasher and have a ball
    Geoff
    00 Pontiac Grand Prix GTP: Couple Mods
    93 Chevy Lumina Base: Few Mods

  18. #15
    Arrive Alive tornado_735's Avatar
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    They use a traditional flasher, but I don't know what number it is.

    2006 Pontiac Grand Prix - 115k
    2001 Mercedes E320 4matic Wagon - Too many miles
    1995 Range Rover 4.0SE V8 - 127k
    "...then I saw that there was a way to Hell, even from the gates of Heaven..."

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