limey222 Michael Cubbon Portland, OR (129 posts) Registered: 08/01/2015 12:55PM Main British Car: 1969 MGB GM 3.4L V6 |
Engine warning light from 94 GM 3.4 PCM
A very simple question, can anyone see a reason why I can't use a small 12v red led pilot light to signal a fault condition? I am concerned about it having too low a resistance to ground unlike a conventional bulb.
See: [www.ebay.com] Edited 1 time(s). Last edit at 09/01/2015 07:08PM by limey222. |
kstevusa kelly stevenson Southern Middle Tennessee (985 posts) Registered: 10/25/2007 09:37AM Main British Car: 2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT |
Re: Engine warning light from 94 GM 3.4 PCM
Should be OK, I used a orange LED for C E L.
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MGBV8 Carl Floyd Kingsport, TN (4513 posts) Registered: 10/23/2007 11:32PM Main British Car: 1979 MGB Buick 215 |
Re: Engine warning light from 94 GM 3.4 PCM
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kstevusa kelly stevenson Southern Middle Tennessee (985 posts) Registered: 10/25/2007 09:37AM Main British Car: 2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT |
Re: Engine warning light from 94 GM 3.4 PCM
I just ordered an Orange 12V. led from Speedway motors assortment and connected directly to the feed from my ECM. Nary a problem, it has illuminated; so it works. No parallel series so is resistor needed?
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danmas Dan Masters Alcoa, Tennessee (578 posts) Registered: 10/28/2007 12:11AM Main British Car: 1974 MGBGT Ford 302 |
Re: Engine warning light from 94 GM 3.4 PCM
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MGBV8 Carl Floyd Kingsport, TN (4513 posts) Registered: 10/23/2007 11:32PM Main British Car: 1979 MGB Buick 215 |
Re: Engine warning light from 94 GM 3.4 PCM
Right, Dan. I was thinking of a bare bones LED.
Kelly, in series in a basic LED application to limit the current (& adjust the brightness). |
danmas Dan Masters Alcoa, Tennessee (578 posts) Registered: 10/28/2007 12:11AM Main British Car: 1974 MGBGT Ford 302 |
Re: Engine warning light from 94 GM 3.4 PCM
Quote: Carl, I used the LEDs shown in the top pic in my MG. The blue LED high beam indicator was blindingly bright compared to the others, so I had to add a resistor in series to tone it down a bit. |
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kstevusa kelly stevenson Southern Middle Tennessee (985 posts) Registered: 10/25/2007 09:37AM Main British Car: 2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT |
Re: Engine warning light from 94 GM 3.4 PCM
OR, just purchase from Speedway, solder and shrink wrap & mount. No reason to complicate things :-)
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