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Old July 12th, 2009, 11:38 PM   #1
chevykid389
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89 ranger no brake lights

quick question.. I just noticed my 89 ranger has no brake lights. The bulbs are brand new but im on my 3rd set of bulbs in the last month or so. Im thinking it might be the brake light switch but im not even sure where it is or what it looks like any thoughts?
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Old July 13th, 2009, 12:15 AM   #2
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If you are on you 3rd set of bulbs, I would be looking into a wiring issue, probably shorting out to ground. Alternator could cause that too, if the regulator is bad and it is spiking up to too many volts.
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Old July 13th, 2009, 04:32 AM   #3
Yota Bill
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if its shorting to ground, it would be blowing the fuse, and the current would not even be getting to the bulbs. alt. output should be 13.8-14.2 volts, so definatley make sure it isnt much over that, and that it stays at a steady voltage. Also make sure there isnt anything else wired into that circuit that could pull excessive current through the bulbs, that the contacts are clean and making a good connection with the bulbs, and that water and mud are not splashing onto the bulbs somehow. You should also make sure it has the correct size fuse in it.
the brake switch is mounted on the brake pedal, pretty easy to find and get too, but that couldnt cause it to blow bulbs.
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Old July 13th, 2009, 10:41 AM   #4
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yeah my volt guage is almost pegged while running I havnt had any other problems tho just these damn brake lights lol
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Old July 13th, 2009, 04:42 PM   #5
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forget about the factory guages, Ford is notorious for using guages that are barely labeled...check the voltage at the battery both with engine off and engine running...if voltage is too high, then diagnose that problem first
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Old July 14th, 2009, 12:58 AM   #6
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Quote:
Originally Posted by Yota Bill View Post
forget about the factory guages, Ford is notorious for using guages that are barely labeled...check the voltage at the battery both with engine off and engine running...if voltage is too high, then diagnose that problem first
yeah guage was def. wrong thanks for that heads up
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Old July 14th, 2009, 03:42 PM   #7
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yeah guage was def. wrong thanks for that heads up
what were the actual voltage readings?
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Old July 14th, 2009, 03:52 PM   #8
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Some Rangers had issues witht the harness for the taillights getting frayed under the driver's seat but I think that was mid/late-90s.
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