Replace gauge lights then odd problem?

74er · 10-22-2007, 08:37 AM

I was inspired by the led gauge lights and made this change. There were some gauges with no lights installed! One with no light was the temp/pressure gauge. It would have 3 lights in the middle...if I'm right its battery at top, oel in middle, and alternator at bottom. The one without a light was the top battery red light. Usually my alternator light had stayed on for a few minutes then goes off. After new bulbs, alternator light is not on at all and the battery light blinks constantly. Any ideas?

Mysterytrain · 10-22-2007, 10:34 AM

You don't want to replace the warning bulbs with LED's. Just replace the gauge lighting.

74er · 10-22-2007, 10:40 AM

Hate to say it but that never crossed my mind as I was doing it. Will check it out tonight. There were some bulb holders that appear to be a type of plastic that the led's wouldn't fit in to and I left those as standard.

Thank you!

fintstone · fintstone's Garage

On your '74...the bulbs are (from the top) alternator (red), low oil pressure warning (green) and parking brakes (green). The alternator bulb serves as a load to the regulator and should not be replaced with an LED..

74er · 10-23-2007, 05:18 AM

I checked the lights in the back on the temp/pressure gauge. The lights in question are the push in type signal lights (not push in and turn) which I replaced / added with the correct non-led bulb.

My gauge looks like the one Pelican offers but the top light has a -B- under it.

I assumed the top light means battery...maybe voltage is ok? but now believe it is the parking brake light?
Middle light, understand, oil pressure.
Bottom light, I assumed this one is the alternator?

So I'll check parking brake electrical and check that alternator light bulb is ok.

Thanks.