Recently purchased two 1999 RB688s model quad axel dump trucks one is a e350 no Jake's and the other is I belive e400 with Jake's but these were company trucks so the one I belive is a e400 came factory with Jake's but since it was a company truck they had removed the switches inside the truck but everything on the engine is there I've tested the Jake's manually and they work but I need to find the plugs for the switches and the switches themselves and I'm not having any luck. It's an older truck so the tags on the wiring in the truck are brittle and only a few exist. I'm sure it's easy to figure out or is it possible to wire direct to the Jake's themselves with a 12v cause I don't need three stage just on or off. Thank you in advance any advice helps.
