glow shift guage

[buck 01]

Put a fuel pressure guage on truck today and will not read pressure
Checked all wires and still reads zero. I have red wire going to fuse panel for a switched
Hot and yellow going to factory trailer plug for opened hot and black going to ground. Green going to sending unit on g side and ground on m side. Everything works lights up and remembers color light but reads zero. When I turn key on it goes to 100 then to 0 then when I start it. It stays at 0. Any ideas. The sending unit sits very close to the top radiator hose.

[Koda22]

If u don't figure it out of call glow shift, the gauges might not be the best but they have great customer service

[tojo32]

Ran into the same thing. Make sure you use a tester and find a source that has a true 12 volt switched and unswitched source.They do have good customer service.

[buck 01]

Their is not a true 12v in the fuse panel all read 13.5 or 14.5.

[sootman73]

Thats the voltage you will see with it running. that variation in voltage wont do anything.

Where did you find a switched 12 volt source in the fuse box? I checked every open connector and none were switched power. there were three constant power sources on the left side of the box but i had to tap into a wire on the backside of the fuse block for switched.

I just did this last night. I used a red wire with green stripe for switched.

[buck 01]

On the right side fuse book said customer access. I tested it and only had power with key on. Will check again. Had a 10 amp fues number 29 on fues block.

[buck 01]

Used a add a fuse link.