For this upgrade, you want the 12V Red 42 LED panel - Dimensions: 127mm x 28mm
https://www.ebay.ca/itm/253816257643




It's almost a perfect fit, but 2 of the corners need to be filed down slightly. I used an angle grinder with worn out flap wheel.




This is what it looks like with a test fit once you get it right.




Then just solder +Power (Red) and -Ground (Green) wires to the appropriate connections on the panel.




Take the original brake light bulb and snip off the bulb itself. You want the socket.




Solder the +Power and -Ground wires from panel to appropriate leads in the socket - and test.
You can see what orientation I have, but check wiring diagram to make sure.




Last thing I did was add a dab of hot glue in each corner to secure the LED panel.




Installed and looks beautiful. It matches the LED light panels I installed in the GT tail lights. It took less than 1 hour.


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3.4L Supercharged 87 GT and Super Duty 4 Indy #163

[This message has been edited by fierosound (edited 08-20-2022).]

Very Nice

Does it have to be red? The lens is already red.

quote Originally posted by ArthurPeale: Does it have to be red? The lens is already red.

If you use white LEDs, the end result will look PINK...

quote Originally posted by fierosound: If you use white LEDs, the end result will look PINK...

Weird. The original bulb doesn't show pink, why would that?

I did my corner lamps with white LEDs, 4000K, the red aren't pink. Is it because of the spectrum of these specific ones?

Arthur, great video find.

US link https://www.ebay.com/itm/253816257643

While Illegal as other external lights, this is about the only thing to replace w/ LED in Fiero...
Because 889 bulb will cook the fixture and even the trim under it in areas w/ heavy traffic problems. LED could have similar heat problem but will get to it bit later...

I don't like the panel so close to the lens to see dots. Someone make/made an LED that drop in replace for 889 and other in same format but believe that replaces 50+ watt halogen and likely way too bright to replace 889 27w.

Result should be about same brightness as halogen 889 bulb they replace and no-one bothers to test this when finish.
A basic test is find any cheap light meter for cameras etc. then add/use a cut down box to limit extra light pollution and measure output thru the Lens and rear glass before and after to see if their close to same number.

IOW LED may look good in a garage, at night, but often fails in daylight even without direct sun light issues. Or Way too bright and blind drivers behind w/ taillights @ night.

Even ignore that... LED many work for some not other even if all install same way w/ same type for other reason not or barely covered in the cave or anywhere else. Highlights:
Heat they make, Heat when parked outside, and other heat problems.
LED don't like "Dirty" power in most cars either. Nothing to block power noise and surges killing most of the LED "upgrades."
Worse if LED are "over driven" to make more light... Could be the "wrong" choice of resistors etc to limit power. But Remember "12v" in cars is typically 14+v (15-20% more volts) when engine runs and that can over drive the LED too. More so when only have resistors to limit power.

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(Jurassic Park)

The Ogre's Fiero Cave

quote Originally posted by theogre: I don't like the panel so close to the lens to see dots. Someone make/made an LED that drop in replace for 889 and other in same format but believe that replaces 50+ watt halogen and likely way too bright to replace 889 27w.

There is a shorter 24 LED panel (80mm x 28mm) available that could be mounted further back in the housing, and so further away from the red lens.

[This message has been edited by fierosound (edited 08-22-2022).]

quote Originally posted by fierosound: If you use white LEDs, the end result will look PINK...

+2

I have the one that Black Top Racing used to sell... It's pink. I like that it's nice and bright but the pinkness of it gives it away as kind of a hack job,

QQ- Can you add a 3rd brake light to an 85 that currently doesn't have one; will it bolt up?

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JM

quote Originally posted by str8maxn: QQ- Can you add a 3rd brake light to an 85 that currently doesn't have one; will it bolt up?

You could add one, OE or aftermarket, but car isn't wired etc for them.

Decades ago some sold a kit for 3rd Brake Light to fit most any car like below but now often have to make something to fit.

This came w/ a "module" to wire to the red taillight direct. Also the Lens is Marked as High Mount Brake to meet USDOT rules w/ DOT/SAE U84 CYCLOPS (U is High Brake, 84 year to meet FMVSS, Cyclops for ID who made. See Cave, Lighbulbs @ bottom)
Another version was sold w/o the module for cars w/ amber rear turn lights and was a bit cheaper. (Price is likely 80s to early 90s $ price.)

I found that in a flea market and spent nothing, keep just for showing was a real thing. Was open but only missing vampire taps for wires... (Found those & others parts inside the light fixture later.)

Sold a lot of them for installing in pre-86 cars.

If can't/won't use OE Fiero High Brake unit... Use some other High Brake and wire to brake pedal switch. Often they are LED or use 2 or more small bulbs that won't melt the fixture when stuck in heavy traffic.

E2A--> Cyclops uses 921 Bulb 12v 18w for any might have 1 of this in use. Format sim to 906 in cave lightbulbs.

[This message has been edited by theogre (edited 01-11-2024).]

Thank you for reply....