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Unread 02-26-2012, 09:58 AM   #1
ymurf
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1979 CJ7 
 
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clutch safety switch

What year did YJ start putting a clutch safety switch in? I just did a 94 YJ 4.0 AX15 with a Dana 300 in my 78 CJ7. I splices at the bulk head my 12v feed to dash.the ignition crank run. I wired my fuel pump up with the YJ harness that originally ran back with the VSS. But when I wired up the ignition crank I couldnt get it to do anything.I found the wire on my CJ bulk head for that but couldnt get it to crank when spliced to the YJ wire.I just ran a wire from the CJ bulk head wire straight to the starter and cranks and starts right up.Could this be a clutch safety switch problem?Did the 94 YJ have that?
Also how do I wire up my reverse lights with the AX15?

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Unread 02-26-2012, 10:07 AM   #2
baritone_mike
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My 88 does not need to have the clutch pushed in to start it.

If they did put one in at some point I would guess it was in 91 with the switch to the 4.0.
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Unread 02-26-2012, 10:37 AM   #3
ymurf
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Quote:
Originally Posted by jsawduste View Post
You got it Tom. Neutral safety switch.

From the starter relay in the PDC to the 10 pin that goes back to the fuel pump. You need to find the wire .....White with a black tracer IIRC and simply ground it.

The reverse light circuit is in there also. Simple SPST switch on the trans.. Grn/Brwn and Yel/Blk are what your looking for.
I am really simple on this wiring stuff so bare with me.I have been doing some google reading and from what I have read the YJ never came out with a clutch safety switch in a manual transmission.This right?
On the reverse light issue,I see the plug on the AX15 but how do I wire that up to make my CJ reverse lights to work?
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Unread 02-26-2012, 10:45 AM   #4
jsawduste
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Quote:
Originally Posted by ymurf View Post
I am really simple on this wiring stuff so bare with me.I have been doing some google reading and from what I have read the YJ never came out with a clutch safety switch in a manual transmission.This right?
On the reverse light issue,I see the plug on the AX15 but how do I wire that up to make my CJ reverse lights to work?
Later models had a switch.

On the rev lights you need to connect the grn/brwn or yellow/Blk.....Whichever has voltage to one side of the switch on the trans. The other side of the switch needs a lead to you CJ reverse light wiringing.
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Unread 02-26-2012, 10:47 AM   #5
YJSteveD
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My '89 doesn't need the clutch pushed in. I always do it though out of habit.
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Unread 02-26-2012, 11:30 AM   #6
Mark05059
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no YJ's have any type of clutch interupt switch stock from the factory.
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Unread 02-26-2012, 11:57 AM   #7
Mean Max
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Quote:
Originally Posted by jsawduste

Later models had a switch.
Nope.

Quote:
Originally Posted by Mark05059
no YJ's have any type of clutch interupt switch stock from the factory.
Yep.

Max
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Unread 02-26-2012, 12:25 PM   #8
BackRoadJPin
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yeah my 1995 does not require the clutch in to start either.
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Unread 02-26-2012, 12:49 PM   #9
ymurf
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Quote:
Originally Posted by jsawduste View Post
Later models had a switch.

On the rev lights you need to connect the grn/brwn or yellow/Blk.....Whichever has voltage to one side of the switch on the trans. The other side of the switch needs a lead to you CJ reverse light wiringing.
Ok I think I found the plug that went to the CJ transmission.It is a two wire plug and with the key on one side is hot.So can I just splice the two wires to the ax15 and how do I know which wire the hot one hooks to?Or am I off on this?
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Unread 02-26-2012, 12:52 PM   #10
TSEJEEPERS
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The neutral safety switch did not start untill the TJs came around.
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Unread 02-26-2012, 02:17 PM   #11
pasinbuy
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Quote:
Originally Posted by jsawduste View Post
Later models had a switch.
Wrongggg.


Did your 93 have one when you bought it?
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Unread 02-26-2012, 02:26 PM   #12
monkeyhouse
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That's what I did with mine when I swapped in my ax-15, just spliced in the wires. Maybe post in the cj forum to make sure you have the right pair of cj wires.
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Unread 02-26-2012, 02:35 PM   #13
ymurf
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Quote:
Originally Posted by monkeyhouse View Post
That's what I did with mine when I swapped in my ax-15, just spliced in the wires. Maybe post in the cj forum to make sure you have the right pair of cj wires.
I did post there this morning with no response..One wire is hot with the key on,How do I know which wire goes to which wire?
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Unread 02-26-2012, 02:44 PM   #14
monkeyhouse
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Quote:
Originally Posted by ymurf View Post
I did post there this morning with no response..One wire is hot with the key on,How do I know which wire goes to which wire?
well, you could post up and ask for a wiring diagram, but i just used trial and error since there's only two wires. On mine there is a fuse on that so, if it's wrong, the fuse will blow.
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Unread 02-26-2012, 03:51 PM   #15
WindsorRenegade
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Quote:
Originally Posted by baritone_mike View Post
If they did put one in at some point I would guess it was in 91 with the switch to the 4.0.
Nope. If it did I never would have gotten home when my slave crapped out on me. Had to crank that ol' girl over in second gear to get her rollin!
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[QUOTE=ruthole;13615845]I just bumped it around till it was in the hole and she went right in. But my hands were hard to fit in there. [/QUOTE]
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