LED Bulbs - Dash Lights - Set of 12 - Repro ~ 1967 - 1968 Mercury Cougar

I installed my old incandescent bulbs to make sure dimmer works...it does. The LED's do not dim, they stay bright until voltage drops low enough for them to turn off.

I'm very pleased, overall. As with all things Cougar under the dash, it was a bit of a struggle, but no more so than if I were replacing filament bulbs. I can now see my instruments with ease.

On the downside, I can't dim my dash lights using the headlight switch. Even my add-on AutoMeter voltmeter and temperature gauges (not mounted in the dash) no longer dim.

WCCC Response:

You should be able to dim. Post this at classiccougarcommunity.com and the community can walk you through diagnosing it.

If you pulling your gauge cluster for any reason, this is the time to put these in. Super easy installation, and they look amazing. Solid recommend.

I recommend doing the white paint step while you've got the dash apart. I tried it both ways and painting both the housing and backing really made everything pop to life. I replaced the diffusers as well and the dash lighting has never looked so good, likely better than it was from the showroom. LED's are of course not "original" but who cares when it looks this good! Only caution is to be careful when removing the wiring harness. I accidentally caused an internal "break" of the temp and fuel gauge power wire. I opted to just replace the harness over repairing the original.

Very bright gauges now easy install - follow the directions on cutting the springs
Bonus----if you have a "Custom Auto Sounds" radio like I do, the Dash lights will now match the radio.