Craig29

Help...

I'm working on a 1992 Dodge and the wait to start light does not turn off. I know the grids are working as the voltage drops and the light dim for a short while (maybe 10 seconds or so), and the wait to start light is on. When the lights brighten up and the relay turns off the heaters, the wait to start light stays on.

I noted two (2) sensors on top of the air intake just behind the grid heater. I pulled the one closest to the front, just behind the grid heater and it looks fine. I ohm' d it and received 16 to 17. I did not check the one just behind it.

One more note, the wait to start light had been working fine.

My questions;
Is there a common problem here that I should check first?
Is there a circuit test procedure to start eliminating potential problems?
And finally, is there a diagram that shows the wait to start light circuit?

Thanks,
Craig

thrashingcows

Best tool for working on these old trucks is a FSM (Factory Service manual) it will have all the information and diagrams you need to diagnose your problem.

The two sensors in the intake are for the grid heaters, and the KSB. Can't recall which is which, but disconnect one or the other and see if the WTS light goes out. If that does not change things then remove one of the wires from each of the solenoids on the drivers inner fender...this will disconnect the grid heater solenoids from powering up...check WTS light again. If the light is still on after these quick tests then I'd assume it might be a bad/shorted bulb, faulty signal to the information center, or the info center circuit has become damaged some how?

Craig29

Thrashingcows,

Did some work on it last night and found the following...

The system doesn't like LED bulbs. I had replaced all the dash light with LED's trying to relive the system of amperage load and found that if I use the incandescent bulb in the WTS socket, it works.

Is the FSM available on this site somewhere?

Craig

thrashingcows

Maybe there is a link to a PDF like on the FSM in The Sticky...maybe do some digging in there. I know I have come across scanned copies on-line before...92/93 will be the same.

Craig29

Roger that. Thanks