Electrical issue - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 09-20-2013, 03:53 PM Thread Starter
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Electrical issue

I have a 97 super duty. I have no running lights. I have brake lights and turn signals. I have checked all the fuses both under the dash and under the hood nothing is blown. Should I be looking for a bad fusible link or relay.
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post #2 of 7 Old 09-20-2013, 06:09 PM
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I would see if there is voltage at the main light switch. First power coming in at terminal B2 (Tan wire with White trace) and then power out (in park and head positions) at terminal R (Brown wire). The light switches are known to go bad. Cheers!

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post #3 of 7 Old 09-21-2013, 05:41 PM Thread Starter
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Thanks will check it out tomorrow
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post #4 of 7 Old 09-27-2013, 09:05 AM Thread Starter
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I just got around to checking out the lighting. I have no power to the switch and I double checked all my fuses nothing is blown. Should I be looking at the relays under the hood? I have no blown fuses in the fuse box under the hood.
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post #5 of 7 Old 09-28-2013, 06:21 AM
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Is there power out of underhood fuse #20 (50A)? If there is, is there power out of underdash fuse #4 (15A)? If there is and there is no power to the switch at terminal B2, then there is most likely a problem in the wiring between the underdash fuse panel and the switch (Tan wire with White trace). Cheers!
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1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
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post #6 of 7 Old 09-28-2013, 05:22 PM
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Quick & dirty test - Pull the knob to the parking light position, then slowly start pulling toward the headlight position. If you see the dash or parking lights come on briefly, that's just a "trick"; the supply power for the headlights is momentarily making contact with the parking light circuit. This would indicate, if you're sure the fuses are good, that the switch is bad.

If you see any electrical burning/damage on the switch terminals or the connector, you can be pretty sure the switch has failed.
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post #7 of 7 Old 10-05-2013, 05:23 PM Thread Starter
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Problem solved found bad fuse. Looking at the fuse does not look blown did a continuity check nothing. Installed new fuse running lights working Thanks!!
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