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Jeremy, Certified Diesel Technician/Electrician
Category: Ford
Satisfied Customers: 3362
Experience:  ASE, NATEF Engines and Electrical certified, EPA 608/609
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I have nocab lights on dash lights or tail lights what might

Customer Question

I have nocab lights on dash lights or tail lights what might be the problem I was told it could be a switch but after reading I'm confusedThis is the 2004 35O 6.0
Submitted: 1 year ago.
Category: Ford
Expert:  Jeremy replied 1 year ago.

My name is ***** ***** I will assist you.

First, I would check the fuses before the switch. Most likely you have a fuse blown. Check them in the cab wit ha test light touching each pin. If one doesn't light the light, then you know that fuse is bad.

If all the fuses test good, let me know if you are comfortable taking the dash apart to test the light switch with a digital multimeter.

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Customer: replied 1 year ago.
See no bad fues checked with test lite which fuse is it that runs this
Expert:  Jeremy replied 1 year ago.

Check fuses 17, 18, and 38.

Expert:  Jeremy replied 1 year ago.

Turn signal relay is on the right, behind the brake controller, behind the dash. You will find 2 relays there. One is the flasher, the other is the battery drain prevention/accessory delay relay. You'll want the one on the left, towards the driver side. That is the flasher relay.

Customer: replied 1 year ago.
Is this in cab or under hood ?
Expert:  Jeremy replied 1 year ago.

In the cab.

Expert:  Jeremy replied 1 year ago.

ignore the turn signal. That was supposed to post to another question. Not sure why it ended up here.

Expert:  Jeremy replied 1 year ago.

if those fuses are good, then move to the switch.

It won;t be a ground because all the lights have their own grounds. All the lights though, they work off the fuse, then the switch for power. So if the fuses are good, then most likely the switch is the culprit.

Expert:  Jeremy replied 1 year ago.

I see you viewed this and this is still showing as a open question due to no positive (3 stars or more) rating.

Did you still need assistance with this?