m35a2 twist style start

[peashooter]

I've been trying to troubleshoot the wiringing myself on my 88af truck. I know this is an older post but for anyone "from the future" reading this trying to figure out what the 4 wires are on the start switch here it is.
-2 wires are obviously for starting (both 74 I think)
-wire 117 is a ground wire, wire 118 goes to the proportional valve warning light circuit on the dual circuit brakes which I believe is also connected eventually with 167 which is the parking brake switch that goes directly to the dash's brale warning light.

So whent the switch is turned to start the truck the DPDS switch both starts the truck and tests the dash's brake warning light momentarily (so you know the light works, just like on our cars when all the idiot lights turn on right away when we start it)

 

[Hooty481]

i would think that the other 2 wires or hook ups on the switch would be for the fuel shutoff when you turn it off on a 5-ton. the multifuel deuce doesnt have this. it has the old pull cable to shut the fuel off and kill the engine.

 

[peashooter]

i would think that the other 2 wires or hook ups on the switch would be for the fuel shutoff when you turn it off on a 5-ton. the multifuel deuce doesnt have this. it has the old pull cable to shut the fuel off and kill the engine.

This is refering to the 4 wire starter switches that some m35a2's and the a3's have instead of the pushbutton starters.... so this switch is just momentary and wouldn't work with fuel shutoff

 

[broman78]

my 87 came with a 5 ton switch also. If you need to test drive it just pull start in in 3rd high.