I need to know how to reset the maint. required light on a1991 jeep wrangler

SOURCE: 1994 jeep wrangler reaer differential oil

It should be just 80/90 gear lube unless ya got a locking diff but most just take 80/90

SOURCE: how to change starter on 1994 jeep wrangler

is it the straight six? if so first disconnect the battery then there should be 2 bolt 13 or 14 mm. take wires off. then reverse for install.

SOURCE: 1992 Jeep Wrangler 2.5L engine maintenance light needs resetting

It's a module under dash programmed to turn on Maintenance light. You can pay $80 to replace module or pull wire going to module and save $80. BTW, it's there to tell you to replace your Oxygen sensor.

SOURCE: "maintenance required" light is stuck on in 1991 Jeep Wrangler

On the dim dashlights, there is usually a rotory switch that you can turn to increase the power to the dash lights. In earlier vehicles it was part of the headlight switch and you just turned it one way or the other to adjust the brightness. In newer vehicles it is a switch like a knob sticking out of the dash on its side that you push up or down to change the brightness of the lamps.

The Maintenance Required light is probable on because the vehicle has hit the 50,000 mile mark and it comes on automatically so that you take the vehicle in for maint. of the emission system. If this is the case there is usually a way to reset it untill another 50,000 miles go by. I would read the owners manual, or better yet pickup a Chilton manual for the vehicle and see if it says how to reset the light. You also may want to have the vehicle checked to see if any trouble codes have been signaled. Good Luck, RAC

SOURCE: replace 1995 jeep wrangler catalytic converter

If it has flanges on both ends, just unbolt it and replace. If it has welded pipes you will need to cut it off and use adapter sleeves and clamps. Really not rocket science...at worst, you may need to remove the hangars on the rear portion of the system to get enough room to install.