c101 connector / renix / disassembly - JeepForum.com
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post #1 of 16 Old 07-30-2010, 09:51 PM Thread Starter
talentjeep
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c101 connector / renix / disassembly

i've searched. haven't found anything specific.

any suggestions/warnings before i try to take it apart and clean it? that gunk looks spooky.


'87 XJ Pioneer with 32" KM2s, etc.
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post #2 of 16 Old 07-30-2010, 11:03 PM
Mickey_D
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Not sure what the C101 connector is. What does it go to / come from?

1997 ZJ 5.2 Orvis, Baby!
1953 Willys M100 trailer Tagalong
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post #3 of 16 Old 07-31-2010, 02:29 AM
balloo93
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C101



Disconnect the battery and just be careful. I have read about people hard-wiring the connections to get away from the plug as mentioned in this JPmagazine article:
C-101
For once, we aren't talking about Trasborg's pile of Jeepsters. We've hit on this one before in these pages, but it is worth covering again. The '87, '88, and some of the '89 model years had this wonderful connector, called the C-101 connector. It connected all the wiring from the inside of the Jeep to the wiring outside of the Jeep. The problem is, it is over 20 years old and is mounted right at the top of the firewall where all the water cascading off of a newly-opened hood can go. If all that wasn't enough to prove a point, there is a TSB from Jeep way back in '89 that provided a crankshaft sensor bypass kit and instructions to get around the C-101 connector and keep the Jeep running. Most of the '89 models, and all of the '90 models didn't even have the C-101, they just went to a rubber grommet passing the wires through the firewall.

Prevention: You can build a rain shield for it, or just be aware of it when you open the hood. Periodic disassembly, cleaning, dielectric-greasing, and reassembly also help the issues.

Cure: Get rid of it. Solder all the wires from the inside of the Jeep to the corresponding wires from the outside of the Jeep and heatshrink it. All the issues will be gone forever. The risk is if you cross wires just once you can fry stuff pretty easily.

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post #4 of 16 Old 08-01-2010, 12:09 AM Thread Starter
talentjeep
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well cleaning and dielectric grease was the order of the day for me but it still looks like total **** to be honest. everything on the dash works now and she runs a little better (but that may be from closing some vacuum connections off).

it didn't look like the wire colors would match up at first glance but i wasn't planning on bypassing it today. if they do i think it would be well worth the time to get out the solder and heat shrink tubing.

heck, soldering on the Jeep isn't like real work because you can't bleed from being stupid (the wound cauterizes itself).

'87 XJ Pioneer with 32" KM2s, etc.
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post #5 of 16 Old 08-01-2010, 01:07 PM
cruiser54
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I clean out all the tar crap with a pocket screwdriver real thoroughly. Then, I soak a rag good with Brake Cleaner and wipe off both halves of the connector numerous times. After that, I spray both halves with a good contact cleaner. Wait a bit and then slap on some dielectric grease just before putting it back together. I beleieve this should be done on all of these old Jeeps along with refreshing and adding grounds to the engine area.
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post #6 of 16 Old 08-01-2010, 07:12 PM Thread Starter
talentjeep
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yea. i think i just found another regular maintenance item. and i need to fab up some sort of water shield.

'87 XJ Pioneer with 32" KM2s, etc.
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post #7 of 16 Old 08-01-2010, 08:04 PM
poorboy_616
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Disconnect battery, remove center bolt, pull apart, clean, grease, re-assmeble, put the bolt back in, reconnect battery and enjoy!

I've done mine twice, now will be the third time it's been apart since I need to rebuild the engine....
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post #8 of 16 Old 02-13-2011, 01:04 PM
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doing mine right now... one Philips head screw holding it to the firewall, center bolt is a 1/4" socket.

1992 YJ 1"Body Lift, Slip Yoke Eliminator & CV Driveshaft,
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post #9 of 16 Old 02-13-2011, 04:04 PM
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If you have a small pick tool, tighten up the terminals in the connector. You'll see what I mean when you look at it.
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post #10 of 16 Old 02-14-2011, 04:12 PM
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thanks for the pointer cruiser54, I found that wrapping a small screw driver with a blue paper shop towel worked well at getting the gunk out of the connector.

However, after thoroughly cleaning it 3 times (and connecting it) with no good outcomes, I gave up on it yesterday and replaced the whole thing with butt connectors; just too many variables in that connector to try and control when you're having engine issues. I noticed that it's mostly just engine sensors/control running through that connector? The fuel pump, interior lights, starter, radio, etc. all work with it disconnected. but somehow, it feels like my windows are faster now... dunno how...

1992 YJ 1"Body Lift, Slip Yoke Eliminator & CV Driveshaft,
2.5" TJ exhaust, WJ valve cover, XJ Computer, External Slave Cyl AX15,
Durango Steeringbox, No track or sway bars, CJ tailgate, on 31's :)
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post #11 of 16 Old 02-09-2017, 05:36 PM
ted939
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In search of C101 on 1988 XJ Renix

Hi, I'm looking to do Cruiser's Tip #3 (Refresh C101 Connector, http://cruiser54.com/?p=24) on my 1988 Renix XJ.

Can anyone tell me if this is my C101 connector in my pictures, just below and to the side of the brake booster (at bottom of my wider picture, with bundle of red, green and black wires coming from it)?

I see in the first picture at http://cruiser54.com/?p=24, a C101 connector that looks a little different, and different placement than what I'm guessing is C101 in my pictures.
Am I looking at wrong thing in my XJ, and C101 is something else?!

If I'm right, and I HAVE properly ID'd my C101, then....
* My XJ's C101 is sticking out of the firewall, and seems like maybe can't come out without removing the Brake Booster (see my pictures). Am I wrong about brake booster needing to be removed to remove C101?
* Plus, I don't see any single bolt in my pictures (as seen and mentioned at http://cruiser54.com/?p=24) that holds the two halves of the C101 together. I do see a clasp on each side of the top of the C101 (see A1 & A2 in my picture above). Is it just a matter of lifting, un-latching those 2 clasps, and then the C101 just unplugs from the portion protruding from the firewall?
* Does anyone know how to disconnect my C101, in order to follow Cruiser54's tip to Refresh it?
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post #12 of 16 Old 02-09-2017, 06:11 PM
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Your C101 has been eliminated, although I would check how well. See that mess zip tied to the firewall bracket near the data sticker?

If you own a Renix Jeep, you must check this out:


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post #13 of 16 Old 02-09-2017, 06:44 PM
ted939
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Thanks!
Now, how to check how well the C101 replacement wiring is (which woulda been done before I bought it in 2002)?

Also, would inadequate C101 replacement wiring and/or general Renix electrical problems contribute to my '88 XJ's power windows/locks/seats getting worse and worse over the last 5 years? I feel like the dome lights are even dimmer (but maybe I'm imagining that??).

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post #14 of 16 Old 02-09-2017, 06:52 PM
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Quote:
Originally Posted by ted939 View Post
Thanks!
Now, how to check how well the C101 replacement wiring is (which woulda been done before I bought it in 2002)?

Also, would inadequate C101 replacement wiring and/or general Renix electrical problems contribute to my '88 XJ's power windows/locks/seats getting worse and worse over the last 5 years? I feel like the dome lights are even dimmer (but maybe I'm imagining that??).
C101 doesn't affect the windows locks seats. those connections must be SOLDERED.

What helps with that is doing Tips 1 and 3. Seriously consider upgrading your main battery cables with a set from www.meanlemons.com.

If you own a Renix Jeep, you must check this out:


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post #15 of 16 Old 02-09-2017, 07:25 PM
ted939
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Quote:
Originally Posted by cruiser54 View Post
C101 doesn't affect the windows locks seats. those connections must be SOLDERED.

What helps with that is doing Tips 1 and 3. Seriously consider upgrading your main battery cables with a set from www.meanlemons.com.
Which connections are you saying must be soldered, the C101 connections or the windows locks seats connections?
And, soldered as opposed to what?

I've seen the www.meanlemons.com cables suggestion on your website (Tip #1, Ground Refreshing), and I looked at www.meanlemons.com, but they don't tell exactly what cables are included or where they'd go. On your site, you have a picture right underneath the link to them, and in that picture is 7 cables and 5-7 pieces of hardware, but I thought there are just two cables that go to and from the battery. How would I find out what to do with all the other cables? Instructions come with them from MeanLemons?

(If you're reading this, XJWonders/MeanLemons, I see the list of Products at your http://meanlemons.com/index.php/products/, but I don't see on your website where to order them, what's included, or any instructions. Am I just missing it? I've went through all your tabs/sections a couple times now)

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