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24v starter was replaced with a 12v starter in the conversion process of the truck

Fair enough point on current draw, so a 12v - 24v boost/step up will probably on its way here shortly. its still interesting that im not reading any voltage from the CTIS fuse slot. In any regard thank you for the assistance it probably has saved me from damaging components that are already...

Im thinking something did get disconnected when it went in for 12v conversion, truck has trickle charger hooked on to maintain batteries when truck is shut off and disconnect on the off position. I have considered the converter but looking at the wiring it doesn't appear that it draws that much...

so on the fuse panel under the dash in the cab (on m916a3) slot labeled "CTIS 24V" was tested for voltage and no voltage was present. checked for short and no continuity was found. so to get the 24V out of the 12V conversion i have to run a power wire from 2 batteries? (if i have to go that...

So turns out that stepping down isn't as large of an issue depending on the system you're powering. Reason for the conversion from 24v to 12v is fleet wide standard everything runs on 12v and a lot of the 24v systems weren't going to be used. Either way it appears that theres no power running...

I was doing some reading and saw that the CTIS on fmtv's, m916's were 24v, so if someone did a conversion from 24v to 12v. would the system still function or would you have to change the CTIS to 12v? if so how can it be done?