I recently installed a rebuilt motor in my 99ford f150 4.6 lt. 4whl. dr. there is one senser wire on bottom right side of of motor that i cant identify or find its connection

If the engine runs without it being connected or does not set a service code then it may not be needed for your engine. Wiring harnesses are designed to fit a wide range of options in a vehicle that may not be in your vehicle.

If it IS electrical, check all the wiring harnesses on the transfer case & clean them. Then check the actuator on the front differential. This is the unit that alows you to "shift on the fly"

Hope this helps:
Cavity/Fuse Diagram (1996 Grand Cherokee, passenger side kick plate to find, Owner's Manual pgs 205-206): 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

Row 1: 1-6 (left to right) Row 2: 7-12 Row 3: 13-18 Row 4: 19-22
1996 Jeep Grand Cherokee Fuse Panel (Passenger Side kick panel) Reply

CAVITY FUSE DESCRIPTION 1 -10 amp (RED) Radio 2 -15 amp (Lt Blue) Cigarette Lighter 3 -10 amp (RED) Rear Washer Switch, Body Controller 4 -10 amp (RED) Airbag 5 -10 amp (RED) Lamp Out Module, Overdrive Switch, OBD II 6 -15 amp (Lt Blue) Vehicle Information Center/Graphic Display Module Park & Side Lamps, Overhead Console Lighted Visor, Automatic Dimming Mirror 7 -20 amp (Yellow) Body Amp, Cluster, Body Controller 8 -20 amp (Yellow) Rear Wiper Motor, Flipper Glass Solenoid, Cargo Lamp, Trailer Tow 9 -15 amp (Lt Blue) Brake Switch 10- 10 amp (RED) Rear Window Defroster 11 -10 amp (RED) ABS Module 12 -10 amp (RED) Heater-Ventilation-A/C Control & Recirculation Motor 13 -15 amp (Lt Blue) Hazard Switch, Turn Signal Switch 14 -15 amp (Lt Blue) Spare 15 -15 amp (Lt Blue) Spare 16 -10 amp (RED) Right & Left Courtesy Lamp, Glove Box Lamp, Halo Lamp Cargo Lamp, Underhood Lamp, Dome/Read Lamp Right & Left Visor, Automatic Dimming Mirror 17 -15 amp (Lt Blue) Radio Illumination, Tail Lamp, Graphic Display Module, Park & Side Lamps, Headlamp Switch, Body Controller 18 -20 amp (Yellow) Spare 19 -15 amp (Lt Blue) Passing Light 20 -15 amp (Lt Blue) Radio, Heater-Ventilation-A/C, Vehicle Information Center 21 -15 amp (Lt Blue) Power Outlet 22 -10 amp (Blue) Airbag Module -------------------------------------------------------------------------------------
1996 Jeep Grand Cherokee Alarm, Remote Starter, Keyless Entry Wiring Information Constant 12V+ Pink/Black Ignition Switch Harness Starter Yellow Ignition Switch Harness Ignition Dark Blue/Gray Ignition Switch Harness Ignition 2 Red/Black Ignition Switch Harness (for AC) Accessory Black/Orange Ignition Switch Harness Tach Gray/White Coil Brake Switch White/Tan Brake Switch Trunk Pin n/a Works with Dome Light Parking Lights Blue/Red (+) Left of Steering Column or Light Switch Head Lamp Tan/Black Light Switch Factory Disarm Purple/Yellow (-) Driver's Kick Panel Black Connector at ECM Door Trigger Yellow (-) Driver's Kick Panel see notes Door Lock 5/Wire in Driver's Inside Driver's Door Orange/Purple Lock Pink/Black Unlock Door Unlock and Passenger's Doors Inside Passenger's Door Black/White L Pink/Black Unlock Horn Wire Gray/Orange (-) Steering Column Windows Up LF=Light Blue, RF=Brown/White, LR=Blue/White, RR=Gray/Black Doors Windows Down LF=White, RF=Purple/White, LR=Red/Black, RR=Green/White
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Hi there is a tan/black wire it should be just above the carpet on the passenger side of the truck. you will need to disconnect this and set the timing then reconnect it and clear the timing code. If this motor will not fire you may want to check and make sure the distributor is set in and timed right. the rotor on these motors dont point at the number one spot on the cap.

There is an actuator motor on the front axle, to the right of the center section that locks the front axle. With the ignition on and the transfer case in 4whl drive check that the two wires at the actuator motor have a power and ground. If it does then the motor is likely bad. They aren't too expensive. Runs around $270 from GM, but can be had for under $100 aftermarket. They are easy to install, disconnect the electrical connector and unscrew it from the axle housing.
This is what you'll be looking for.


This is an image of the early design. The new design is mostly plastic and doesn't have the wires attached. I'm not 100% sure which design your vehicle has.

no you need a rebuilt kit for a master/slave cylinder.

top row, left to right;
ground,memory,panel light,rear left spkr -,f rt spkr-, f lt spkr -, empty.
bottom row;
ylw batt +, red batt +, empty, rrspkr +,rlspkr +,frspkr +,flspkr +, empty.

should be at the back of the motor down near the bottom of the block and should have a thick battery cable and a couple of smaller electrical wires connected to it.
Not sure which side of the block it is on but it has to turn the flywheel to start it.

bleed brakes again you got air in them .check make sure master cylinder is low on fluid.

this may be no help atall, but i had a GMC pickup once, and there is a vacuum switch that was stuck and that was causing my problem. it was around a $300 dollar fix, and that was 8 years ago, so i imagine it is quite a bit more expensive now.