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I did post back, with the overhead console only it does not work. Never said i was going to run out and spend another $20-$30 at the jy for a BCM and and continue trying. He posted this on several jeep forums over two years ago and not one person has gotten it to work. So either its too much...
In the donor XJ, the sentry wiring is bundled with the rest of the cab and engine wiring. But with some patience it can be separated into a self-contained harness.
Here's a (lousy cell phone) picture of some of the sentry system components. Clockwise from the top, the brake booster cover (with a hole for the sensor), the remote module with mounting bracket, the display module, 2 axle fluid sensors (there are a couple others, they are all the same) and 4...
found the wiring diagram...its really isn't very complicated but it would be pain to install. The one thing i never really figured out when i was messing with it was the "Engine off In(put?)", there isn't a choke heater relay in my truck to run that wire to.
There were holes drilled into the axles, t-case, etc. for fluid level sensors. A harness ran under the length of the XJ, into the engine bay and to a box underneath the dash called the system sentry remote module (which looks exactly like the electronic voice alert module in Chryslers)...
If you are looking for more info beyond what's in that thread, i've got a wiring diagram and an almost complete system in a box somewhere in my garage.
RR window connector (the pins are not sequential on the connector):
Pin 1 BR Right Rear Power Window Motor Up Control
Pin 2 DB/WT Left Front Door Power Lock/Window Switch Control
Pin 3 YL Left Front Door Power Lock/Window Switch Output
Pin 4 BR/LB Right Rear Power Window Down Control
Pin 5 VT...
As of Wed 2/4, there's an 87XJ Limited at the LKQ pick a part on Wallisville road. The XJ is black with a red driver's side door, about 3 rows from the back of the SUV/Truck Section. It had 220k on the clock, i didn't crawl under it to check the gear ratio.
I really hate sending anyone to...
My bad, saw the first set of 4.0L engines, then didn't scroll down far enough. Its certainly less than what i'm spending on my stroker. Besides the 4.2l crank, i'd be curious to know what other parts they are using.
I pulled most of a sentry system out of a junked 85 or 86 XJ chief. Basically there's a sensor for every one of those lights. Some of the sensors are connected directly to the display box. Some go thru a separate control box mounted under the dash, then into the display box.
Here's a wiring...
What year? Which harness, dash, headlight, engine bay?....if you are more specific someone may be able to help you out. After that there's the local pick and pull, car-part.com and sometimes harnesses pop up on ebay.