I need to replace the neutral safety switch on a 1989 Jeep Comanche 5 speed manual transmission

wow, no DTC stated, so we must guess which one, and IS KEY to the cause..
ah , smog fails for CEL glowing
said but true
and it dont lie, the switch , conn. or wires to it are bad.
the real question is where is it and how to test it.
you can google neutral safety switch all day and learn what it does.
The TJ jeep
has. the 42RLE box.
TRS it has. "transmission range, switch"
here it is.





seen here
TRANSMISSION RANGE
SENSOR
DESCRIPTION
The Transmission Range Sensor (TRS) is mounted
to the top of the valve body inside the transmission
and can only be serviced by removing the valve body
assembly. The electrical connector extends through
the transmission case (Fig. 249





REMOVAL
(1) Disconnect the TRS connector.
(2) Remove valve body assembly from vehicle. (OOPS)!
(3) Remove the manual shaft seal (Fig. 250).
(5) Slide TRS off of manual valve shaft.
INSTALLATION
(1) Install the TRS to the manual shaft. Make sure
TRS locating pin rests in manual valve bore slot.
(2) Install the TRS/manual shaft retaining screw
and torque to 5 N·m (45 in. lbs.) torque.
(3) Install the manual shaft seal.
(4) Install valve body to the transmission.

my points! given above. facts.
check fuses first.we check the voltages second at p/n sense pins.check for corrosion on the 3 pins related,even re-seat all connectors and pray it goes away cleaning all 3 with real electrical conn spray.does this help?

btw , you never asked a question?
1: how can I fix this.?
2: who, can? (any ASE shop on earth)
3: what parts do I need? (a TRS)
4: what are the steps. (posted)
so i guessed, 1 and 3 and 4.

If you have a 5-speed manual transmission, you're probably looking for the clutch safety switch, which is located on the clutch pedal under the dash near the firewall, rather than the neutral safety switch, which is on the left side of automatic transmissions. Out of curiosity, why do you believe that it needs to be serviced?

Depends on your engine.

1980 JEEP CJ-7 2.5L 4-cyl Engine Code [B]
CAPACITIES
Engine, GM without filter..........2.4 quarts[1]
Wix Filter ........ 51040
Cooling System, Initial Fill..........8.0 quarts
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A999, 32RH..........8.4 quarts
3 speed A904, 30RH..........7.0 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Oil Drain Plug.....25 ft-lbs
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

1980 JEEP CJ-7 4.2L 6-cyl Engine Code [C]
CAPACITIES
Engine, without filter..........5.0 quarts[1]
Wix Filter..... 51522
Cooling System, Initial Fill..........11.0 quarts
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A999, 32RH..........8.4 quarts
3 speed A904, 30RH..........7.0 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Oil Drain Plug.....30 ft-lbs
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

1980 JEEP CJ-7 5.0L 8-cyl Engine Code [H]
CAPACITIES
Engine, without filter..........4.0 quarts[1]
Wix Filter..... 51258
Cooling System, Initial Fill..........13.0 quarts
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A904, 30RH..........7.0 quarts
3 speed A999, 32RH..........8.4 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

Oilman

No start (engine doesn't crank with starter motor) in neutral and park position, one or both

http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?fromSearchPage=true&pageId=0900c152800a9e62&partName=Neutral+Start+Back-Up+Light+Switch&partId=0900c152800a9e62 Click on link to the repair guide.

It is under the dash and behind the clutch pedal arm.

Click image for zoom...

Fig. 1: Park/neutral position switch and manual lever

The switch is mounted in the transmission and has no direct adjustment. Proper operation is determined by correct shift linkage adjustment.

1. Raise and support the front end on jackstands.
   
2. Place a drain pan under the switch.
   
3. Unscrew the switch from the transmission.
   
4. Replace the switch, using a new seal. Tighten the switch to 24 ft. lbs. (33 Nm).
   
5. Refill the transmission.

Hope this helps (remember to rate this answer).

You mean bell housing bolts? It has 6.

you cant bypass neutral safety switch.because you need back up lights.it has to be replaced.cant bypass it.

These pages cover the transmissions used in Jeeps over the years. Transmissions are arranged by the most recently introduced transmissions first.
Factory Transmissions 45RFE: The 45RFE four speed automatic transmission was used in 1999 Jeep Grand Cherokees with 4.7L engines. 46RE: The 46RE four speed automatic transmission was used in 1998 Jeep Grand Cherokees with 5.9L engines.
44RE: The 44RE four speed automatic transmission was used in 1996 to 1998 Jeep Grand Cherokee's with 5.2L engines.
42RE: The 42RE four speed automatic transmission was used in 1993.3 to 1998 Jeep Grand Cherokees with 4.0L engines.
46RH: The 46RH four speed automatic transmission was used in 1993 to 1995 Jeep Grand Cherokees with 5.2L engines.
32RH: The 32RH three speed automatic transmission was used in 1992 to 1995 Wrangler with 4.0L engine and it continues to be used in 1997+ Wrangler with 4.0L engine.
30RH: The 30RH three speed automatic transmission was used in 1992 to 1995 Wrangler & 1992 to 1996 Cherokee with 2.5L engine.
AW4: The AW4 four speed automatic transmission was used in 1987 to 1990 Jeep Cherokee (XJ), & Jeep Comanche with 2.5L & 4.0L engines. The AW4 was also used in 1987 through 1992 Jeep Comanche & 1991 through 1998 Jeep Cherokee & 1993 through 1993.5 Jeep Grand Cherokee with 4.0L engines.
AX-15: The AX-15 is a medium duty 5 speed manual transmission. It was introduced in mid 1989 in YJs with the 4.2L engine and XJs and MJs with this engine. The first year of the Grand Cherokee (ZJ), the AX-15 was rare option only with the 4.0L engine. The AX-15 is still used in TJs and XJs with the 4.0L engine.
AX-5: The AX-5 (and AX-4, the non-overdrive version) is a light duty 5 speed manual transmission. It was used in all Wranglers from 1987 equipped with the 2.5L I4 engine. It was also used in Cherokees (XJ) and Comanches (MJ) with the 2.8L V6 and 2.5L I4.
BA10/5: The BA 10/5 is a light duty 5 speed manual transmission. It was used in all 4.2L equipped Wranglers (YJ) from 1987 to mid-1989, and all 4.0L Cherokees (XJ) and Comanches (MJ) for the same years.
T-5: The T-5 is a light duty 5 speed transmission used in CJs from 1982 until 1986. It was also found in some 84-85 Cherokees (XJ).
TF727: The TF 727 is a heavy duty 3 speed automatic used in full sized Jeeps (SJs and J series pickups) from 1980-1983. From 1984-1992 the 727 was only used in these trucks with the AMC 360 V8.
999: The 999 is a medium duty 3 speed automatic used in CJs from 1980-1986. It was also used in 1984-1990 SJs and J pickups with the 4.2L engine, in the YJ from 1987-1991 with the 2.5L and 4.2L engine, and in the XJ and MJ through 1986.
904,909: The 904 and 909 are light duty 3 speed automatic used in CJs from 1980-1986 only with the I4 engine. It was also used during this time period with XJs and MJs with the I4 and V6 engine. The 909 is a 904 with a lock-up torque converter.
SR-4, T-4: The SR-4 and T-4 are light duty four speed manual transmissions used in CJs from 1980 until 1986.
T-176, T-177, T-178: The T-176, T-177, and T-178 are a medium duty four speed manual transmission used in Jeep CJs, SJs, and J pickups from 1980-1986.
T-150: The T-150 is the 3 speed manual transmission that was used in CJs from 1976 to 1979.
T-18: The T-18 is a heavy duty four speed used in Jeeps from 1971 until 1981. It was only used in the CJ from 1971-1979.
T-15: The T-15 was used only in V8 equipped CJs and Jeep trucks from 1972 to 1975.
TH400: The TH 400 is a heavy duty three speed automatic that was used in CJs with the BW 13-39 transfer case from 1976-1979. The TH 400 was also used in full sized Jeeps (SJs and J series pickups) from the late 60s until 1979.
T-14: he T-14 is a three speed transmission used with the "Dauntless" Buick V6 and AMC I6 from 1967 to 1975.
T-86: The T-86 is one of the three speeds used with the many CJs and Jeepster Commandos with the "Dauntless" Buick V6.
T-98: The T-98 varies only slightly from the T-18. It was used from the 50s until 1970 in different Jeeps.
T-90: The T-90 was the standard three speed for CJ and their military counterparts built from 1945 until 1971. It was also the standard transmission for Willys Wagons, Willys Pickups, FC trucks, and Jeepster/Commandos during this time period.
T-84: The T-84 is a light duty three speed used in MBs and GPWs during WWII

Good luck!!!