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Power Strokes
94-97 Tech
Battery Light Never Comes On
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[QUOTE="jschildm, post: 1543987, member: 1864"] 1997 F-350 - Headed to work this morning I notice the lights were dim and the volt gage was lower than normal. It was way after the glow plug relay would have kicked off, so I was suspicious. The alternator was definitely not charging. However, the battery light wasn't on, which is odd because they relatively notoriously come on frequently. I take a little time over lunch to troubleshoot, and the first thing I do is turn the key on without starting to confirm the battery light comes on. Nope, no battery light with the key on and engine off. I figure thats my problem, no signal to the alternator to charge. The only related fuse I saw in the owners manual was underhood maxi fuse 17. I pulled it and it looked OK (I didn't check resistance across it, and should have). I pulled the plug off the alternator, and I'll be darned if the grn/r wire and yellow wire didn't both have battery voltage. I know the grn/r is the signal wire for the alternator. Well, I am not sure why the battery light won't come on but I figure I'll check the fusable links anyways, and they appeared to be good. All I can really think of at this point, with power at the plug on the signal wire, but no battery light at any point, is that something is failed in the alternator causing that light to never come on. I did see one person that said to ground the grn/r wire and see if the bulb comes on to confirm that circuit is working, so I might try that this evening. Does anyone else have thoughts on what might be causing this or similar experiences? I used the search function but most people have the light coming on when they don't want it, not the light never coming on. [/QUOTE]
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94-97 Tech
Battery Light Never Comes On
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