FMTV . . . Blinded by the CTIS Light?Posted: 2014/01/07
Drivers, is the CTIS light on the dash of your LTAS FMTV lit? Is it driving you batty?
Then you need to eyeball the CTIS switch bypass cable (plug 31). It’s inside the cab under the instrument panel. This cable should be unplugged only when the vehicle is operating in cold temperatures and has an arctic heater kit installed.
Most of these LTAS vehicles were fielded without the arctic heater but with the cable unplugged. That means the CTIS is off.
It’s not a big deal as long as you’re willing to manually check the tire pressure for whatever terrain and speed you’re operating at. But it does mean that CTIS light is gonna glow!
So just plug the cable back in place to power up the CTIS system and out goes the light!