CTIS Zero lights....

[1 Patriot-of-many]

Finally got a chance to jump my wrecker which was towed home. Got it started and drove it down the driveway. None of the CTIS lights are coming on. Anyone encounter this problem before? Should I exchange a known good ECU as a start figuring it's most likely the ECU?

 

[VPed]

I thought there was a fuse under the dash somewhere that could be blown.

 

[Suprman]

Turn on the headlights try again

 

[Jeepsinker]

Turn on the headlights try again

Yep!

 

[1 Patriot-of-many]

What would that have to do with it guys?

 

[bikeman]

What would that have to do with it guys?

Internal lighting is connected through the light switch to avoid accidental illumination of the interior during blackout conditions. This was much more important in the Cold War era than current operations.

Try running and make sure you put your lights on the full normal setting. See what happens.

 

[trooper632]

I have one truck that the lights wont come on until it has full air pressure in the air tanks, then they start working.

 

[1 Patriot-of-many]

Internal lighting is connected through the light switch to avoid accidental illumination of the interior during blackout conditions. This was much more important in the Cold War era than current operations.

Try running and make sure you put your lights on the full normal setting. See what happens.

All my other trucks start flashing without turning the lights on. This one is dead either way. No flashing lights, no cycling. Is it possible because my ppv valve is frozen that's why I get nothing. I get the backlight with the lights on but none of the little dots lit up, all my other trucks have the dot lit up flashing or solid lights on or not.

 

[Jeepsinker]

It's not dead, just sleeping.

 

[1 Patriot-of-many]

It's not dead, just sleeping.

I hope

 

[bikeman]

ok, poke it with a stick, see if that works.

I know there are some oddities with the CTIS system, so, really no clue. What's the TM say?

 

[Jeepsinker]

Even if the lights were on it wouldn't cycle until system pressure gets up to 120 psi. Get it up to pressure and see if it farts.

 

[1 Patriot-of-many]

Even if the lights were on it wouldn't cycle until system pressure gets up to 120 psi. Get it up to pressure and see if it farts.

Have. Its been up to 150. Ppv is stuck.

 

[Jeepsinker]

Well poop...

 

[1 Patriot-of-many]

ok, poke it with a stick, see if that works.

I know there are some oddities with the CTIS system, so, really no clue. What's the TM say?

Nothing about zero lights but does about the overspeed warning being on. Guess I'll start the troubleshooting there. Good thing I have extra A2's around, I can substitute parts for troubleshooting on the fly when it warms up a little that is.

 

[k5ontherocks]

Any luck with your CTIS issue of no lights? mine had been working great, till yesterday. Illuminations all work fine but cannot get the red light to illuminate in any of the buttons. It lights if I hold it but does nothing. Then TMs do not cover this issue in them.

 

[M813rc]

It seems on some trucks you get CTIS lights with the truck lights off, some you don't.
One of my M931's CTIS lights up when you turn on the battery switch with the headlights off. The other, and my buddy's M923, don't light up until the headlight switch is turned on.

Cheers

 

[k5ontherocks]

Mine lights up with the headlamp switch. However, mine has an issue now, its not just lights turned off. It had worked flawlessly for 2 weeks. Yes i used mine a lot, mostly just playing around in back field and such,but it had worked great till just the other day. The little diag i have found seems to point to bad ground or controller. i will check wirinig, but im skeptical i will find anything.

 

[wheelspinner]

Have. Its been up to 150. Ppv is stuck.

If your PPV is stuck, you are not getting accesory air. Your gauges are only for the primary and secondary braking systems. Need to free that up first before CTIS will see anything.

 

[k5ontherocks]

All my accessories work,no i have another issue.