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post #1 of 12 Old 04-15-2013, 07:14 PM Thread Starter
jamison
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1995 YJ Wrangler 
 
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what is this?

I was doing some work on my alternator today (trying to get it to charge the batt). I'm pretty sure I got it working but found this and have no clue what it is. Any ideas? It's mounted towards the front of the passenger fender. I located the voltage regulator but it's further back. This guy only has one black or dark grey wire coming out of it.

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post #2 of 12 Old 04-15-2013, 09:51 PM
JeffreyCharles
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That's your ignition module/computer. Called the ignition control unit in the FSM.

Jeffrey Charles
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post #3 of 12 Old 04-16-2013, 02:05 AM
John Strenk
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Well it could be either of these:


Left is the idle speed controller, right is a prestolite ignition control module.

Since it's a 77, it's probably not the idle control so I agree with JeffreyCharles and it's an unused ICM for a Prestolite Distributor.
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post #4 of 12 Old 04-16-2013, 06:44 AM Thread Starter
jamison
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Thanks for the help guys. I hated to leave it just sitting there not connected. Guess that means it's coming out. One last question, I suppose. While waiting for the alternator there was and extra grey wire on the alternator itself. Other than that I had a red (I suppose to charge the battery ), a black ground and a green (to the solenoid). From what I read the grey goes to the ignition and there is a purple wire cut at about the alternator that I traced to the top of the fuse block. I also left it unhooked as my wiring is a rats nest and I just threw in a push button start to get it running. Any thoughts on the grey/purple wire?
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post #5 of 12 Old 04-16-2013, 07:30 AM
wellmax
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Jamison,
if your jeep runs and that part is not connected, I would take it off and gently place it in a box marked:

"parts that came off the jeep and were not needed at the time"

under no reason to throw it away at this time.

someday, down the road, you may hit a big bump and the jeep stops running, because the (whatever it is, is not hooked up)

Good luck,


its about time to get the tops off our old jeeps around western KY
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post #6 of 12 Old 04-16-2013, 07:30 AM
Redmanchew
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purple is usually temp sending unit and usually comes from that area.....

1982 CJ-7 2003 4.3 chevy vortec, 4L60E, Clocked Dana 300 35 x 12.5 x 15 KM2 on Cragar 399's. Vanco Brake Booster. Power steering conversion. Warn front and rear bumpers with swing away. Moser 1 piece rears. Rear OX.

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remove rear axle, xfer in N, trans in 5th, remove neg batt cable, key to Run and go??
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post #7 of 12 Old 04-16-2013, 07:43 AM
frhrwa
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be really really careful with that, its a TDM detonator, set to explode if the second amendment is taken away...

I want to die in my sleep like my grandfather, not screaming in terror like the passengers in his JEEP!...
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post #8 of 12 Old 04-16-2013, 07:55 AM
nosheep
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^--- this but I was thinking, Be really careful with that its a ICM and is set to explode from the factory if you look at it wrong. During my build I broke down and bought a DUI to get rid of that POS.
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post #9 of 12 Old 04-16-2013, 08:00 AM Thread Starter
jamison
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Quote:
Originally Posted by wellmax View Post
Jamison,
if your jeep runs and that part is not connected, I would take it off and gently place it in a box marked:

"parts that came off the jeep and were not needed at the time"

under no reason to throw it away at this time.

someday, down the road, you may hit a big bump and the jeep stops running, because the (whatever it is, is not hooked up)

Good luck,


its about time to get the tops off our old jeeps around western KY
Definitely a good idea. I originally got the jeep when i was 16 and had no clue what I was doing. i had pulled off anything i could get two with a set of wrenches and a pocket knife. Left everything just scattered around. Thankfully, my dad was awesome enough to know i would realize my mistakes down the road and picked up the pieces and organized them in a big set of drawers with individual compartments. And now that I'm trying to get it back running again, I have had many scenarios where i think I need something and just have to go shopping in the drawers. Thanks dad!


Quote:
Originally Posted by Redmanchew View Post
purple is usually temp sending unit and usually comes from that area.....
Thanks for the heads up. I think i have a schematic of my fuse block somewhere ( from trying to wire up the push button ignition). I'll try to trace it starting from there.
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post #10 of 12 Old 04-16-2013, 02:19 PM
Matt1981CJ7
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According to my manual, solid purple is oil pressure sender.

Purple w/white tracer is temp sender.

Good luck,

Matt
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post #11 of 12 Old 04-16-2013, 03:01 PM Thread Starter
jamison
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Quote:
Originally Posted by Matt1981CJ7 View Post
According to my manual, solid purple is oil pressure sender.

Purple w/white tracer is temp sender.

Good luck,

Matt
Cool. Thanks. Which manual do you have?
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post #12 of 12 Old 04-16-2013, 03:03 PM
Matt1981CJ7
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I have a couple, but I looked that up in my Haynes.

Matt
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