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Mike S.
Mike S., ASE Certified Technician
Category: Ford
Satisfied Customers: 7431
Experience:  ASE Certified Master Technician
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Ford ranger: I have a 97 ford ranger. I accidentally hooked

Customer Question

I have a 97 ford ranger. I accidentally hooked up the positive terminal to the negative on the battery and blew the power to the cab lights. So, I have no lights on the dash, glove box, and cab light. What are some troubleshooting steps?
Submitted: 2 years ago.
Category: Ford
Expert:  Mike S. replied 2 years ago.
If you tell me what engine is in this I can lookup the wiring diagram and tell you where to start testing. I aslo need to know if this is a super or not.
You will most likely need either a voltmeter or 12 volt test light.
Customer: replied 2 years ago.
It is the 4.0 L 6 cylinder XLT model. It is a super cab.
Expert:  Mike S. replied 2 years ago.
Test these fuses on btoh sides of the fuse, fuse #3 (hot all the time) in the I/P fuse panel, fuse #11 (hot with key on run) in the same I/P panel and fuse #7 (hot with key on run and headlight switch on), in the same I/P panel.
Expert:  Mike S. replied 2 years ago.
Also test the ignition maxi fuse #14 (hot all the time) in the engine compartment fuse/ relay box.
Expert:  Mike S. replied 2 years ago.
Also, park lamps maxi fuse #8 (hot all the time) in the engine compartment fuse/ relay box.
Customer: replied 2 years ago.
So this is what I got.
#11 - 11.20
#7 - 8.56
#3. - 1.60
#8. - 8.41
#14 - 3.9What next?
Expert:  Mike S. replied 2 years ago.
Are they voltage readings?
Expert:  Mike S. replied 2 years ago.
A simple yes or no would have sufficed. I assume it did mean voltages. They should all be battery voltage (12 volts).
Customer: replied 2 years ago.
Th ey are voltage readings
Expert:  Mike S. replied 2 years ago.
They should all be 12 volts.
Customer: replied 2 years ago.
It looks like 14 and 3 start at around 12 then drop
Expert:  Mike S. replied 2 years ago.
Why are they dropping?
Customer: replied 2 years ago.
That's why I'm on this site. For experts to lead me to the problem.
Expert:  Mike S. replied 2 years ago.
No, I meant are you turning the key from off to run or start or something?
Expert:  Mike S. replied 2 years ago.
Here are the wiring diagrams, first the one showing fuses 3,7 and 11.
http://1drv.ms/1A6LZG8
Expert:  Mike S. replied 2 years ago.
Now 14, http://1drv.ms/1HnC3ue
Expert:  Mike S. replied 2 years ago.
And finally 8, http://1drv.ms/1A6MhNc
Expert:  Mike S. replied 2 years ago.
Well fuse #14 is a maxi fuse. It's basically straight from the battery except it does also connect to the starter relay. Check all those connections. try to twist the connections by hand. If you can twist any, then it's too loose, tighten it up and repeat all the tests.
The connections to twist and check would first be both battery terminal ends, then the connection on the starter relay, then the connection to the engine compartment fuse box.

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