1967 IH 444 gas. Engine runs perfectly with temporary switch "on", then jumping at the solenoid. Got this new switch & need help running wires to it, with inline fuse(s). Terminals read B, ACC, S, P, & G. Won't need ACC, since lites are not wired. G can just come from frame, right? What is P? Thanks in advance.
- Thread starter buffbenj
- Start date
wore out
Well-known Member
Where did you get the new switch, from CIH, or is it aftermarket?
My best GUESS as to the markings:
B = Battery
ACC = ACCESSORY
S = "Start" (to solenoid)
P = Terminal that gets powered when switch is "ON"
G = Ground (Used to test warning lights, if so used, and tractor is wired for this function.)
Good luck, use info at your own risk!
Steve@Advance
Well-known Member
Do you have an ohm meter?
It's a pretty sure bet the B terminal will be power from the battery.
Put one lead of your meter on the B terminal, start turning the switch and see what terminals connect in each position.
I would not ground the G terminal! No reason to ground any terminal of an ignition switch. Good chance the G terminal is for glow plugs if it were used on a diesel. If so, and you ground it, it will short the battery terminal when the switch is in the G position.
If you are going to use a fuse, only need to fuse the feed to the B terminal. If you use an inline fuse holder, choose a heavy duty one, or go with a spade type fuse holder with a cover. The spring type inline holders tend to be loose and don't like the vibration and rough service of a tractor.
It's a pretty sure bet the B terminal will be power from the battery.
Put one lead of your meter on the B terminal, start turning the switch and see what terminals connect in each position.
I would not ground the G terminal! No reason to ground any terminal of an ignition switch. Good chance the G terminal is for glow plugs if it were used on a diesel. If so, and you ground it, it will short the battery terminal when the switch is in the G position.
If you are going to use a fuse, only need to fuse the feed to the B terminal. If you use an inline fuse holder, choose a heavy duty one, or go with a spade type fuse holder with a cover. The spring type inline holders tend to be loose and don't like the vibration and rough service of a tractor.
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