Electrical Nuts & Bolts: Flashy Flashers
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Electrical Nuts & Bolts: Flashy Flashers
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TSB8C
Old Time Jeeper
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- Cut-n-Shoot, TX
- Vehicle(s)
- 1984 CJ7, 420 HP "ZZ6 EFI" Crate engine, 700R4, D300, Dana30 front, Dana489 rear, 4.56 gears, 4" lift
I replaced all my exterior lights with LEDs. I already had all the inside lights done previously (Dakota Digital gauges with LED indicators, LED courtesy lights under the dash, LED map lights in the rearview, etc). When I replaced all the exterior lights (tail/brake, side markers and front blinkers), no blinkers and no flashers. I replaced the blinker flasher unit in the fuse panel, still no blinkers. I then soldered 100 ohm resistors, one each, behind the front blinkers between the blinker wire (not the marker light wire) and the blinker housing (ground). That and a new electronic flasher in the fuse panel, now blinkers work fine. I then also replaced the flasher unit in the fuse panel for the emergency flashers with the same electronic unit as used for the blinkers. But still no emergency flashers. I then discovered that the polarity in the fuse panel is opposite for the blinker flasher unit and the emergency flasher unit. A quick polarity reverser adaptor and now it all works properly. The lights I used are 1157-A27-T bulbs for the front blinkers and 194-AHP5 bulbs for the front side markers, all from SuperbrightLEDs.com. These are auto-polarity reversing LED bulbs. I used a United Pacific 90650 flasher unit for the blinkers in the fuse panel and their 90652 unit for the emergency flashers. The 90652 is the exact same as the 90650, but for $1 more includes the polarity reversing adaptor plug. For reference, the taillights are from Maxhaul, # 80685. These are 38 LED units. With a slight trim of the mounting studs, they fit perfectly into the tail light guards (Smittybuilt # 8660) that used to house the old stock lights.
I had to use the polarity switching base on both flashers. I could not get the flashers to work with the new led bulbs. i am also running an led headlift with a white ring that goes on with parking lights and an amber ring that is set to run with the directionals and flashers. i got that all to work using standard bulbs in both side markers and parking lamps.
AI says that if i ground out the non power leads at both of the side markers ( green wires in my harness) that should enable all lights and flashers to function properly with the led bulbs. led bulbs i have are 194-AHP5 for side markers and 1157-A27T for parking lamps