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jhowland

brake lights

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found out I have no brake lights, both are out.  Fuse is good, and I put in a brand new relay.  Still no joy.

I also noted that stepping on the brake does NOT deactivate cruise control.

 I was troubleshooting more today and when I stepped on brake the lights came on, as they should.  But only once.  I suspect one or both of the switches on the air brake need to be replaced.  Looks like a very simple fix but does anyone have part numbers or another idea?

Thanks

 

04 40DST diplomat le

Edited by jhowland
forgot info

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Not sure about yours in particular, but this should be a NAPA item (assuming you have a NAPA that carries truck parts). To confirm, are there any numbers on the one you've got now? They are just basic pneumatically operated on/off switches.

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Your switches, connections and grounds might just need a good cleaning, it costs nothing but time and effort.

My water heater would not stay lit yesterday, I unplugged and reattached the flame sensor wire on the control board and  the WH began working fine.

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