Need to re wire between blower and sensor color code

lead burned through
that's easy
using the wrong fuse size
and the feed is shorted,
the correct fuse prevents the burned wires.

here are the HVAC pages
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

lots of things can short. in cars. (topic Hvac)

• the wires.
• the connectors
• the HVAC motors (actuators)
• the blower.

if you had stated the exact wire color and what it connect to exacty
we can state who shorted.

Fuse 1 , 40amp runs the blower. dark green.
Fuse 20 , 10amps runs others.
Fuse 7 runs zone control,,,10A and all 4 damper motors actuators.
see 8w-42-6 pages.

ok you have your FSM and now can find who connects to what.

bingo !

http://www.fixkick.com/look/odds-ends/jeep/2000GC-heater-motor.JPG

one word
alldata dot com

if USA car,is it?

Usually you have to splice the wires into the old plug.
You might be able to find a diagram on the websites for auto parts stores such as autozone.

You will have to check the flap operating controls behind the centre consol as anything could be wrong from a vacumn pipe to a operating mechanism ,even the computer controlling the climatic control .

Check where the wires go into the blower housing. There is usually what appears to be a small plate held by 1 or 2 screws that the wires plug into. This is the speed control resistor. If it's going bad, it will cause the problem you describe.

Maybe bad blend door

sounds like it could be the motor ..if so nasty job .. you can download complete manuals on the internet for free ..then you can take it from there wether or not you wish to tackle the job yourself .. good luck

I had this problem on a 99 grand cherokee limited, It was the heater blend doors and if you have dual climate control one side usually goes out before the other. These blend doors are located behind the glove box unaccessible inside the HVAC shell.
(http://www.wjjeeps.com/hvac_sub_assembly.htm) Motor failures for this HVAC sub assemblies is also something to look for although much less common.
My local dealership estimated $$$$$$$$$950.00 because they have to remove the entire dash so I looked around for something else.
http://cgi.ebay.com/ebaymotors/Blen-Dor-Jeep-Grand-Cherokee-Blend-Door-Heater-Repair_W0QQcmdZViewItemQQhashZitem3eef1e1cd6QQitemZ270299700438QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

I used something similar to this and now have heat that is controlled solely by the knob nearest the driver. It wasn't very difficult just kind of a tight squeeze.
Hope this helps
GOOD LUCK

Review this links:
- WJ Section 24 Heating Air Conditioning ewj24 (page 32 and next)
- WJ Section 08w Wiring Diagrams ewj8w
* page 19 Index
* page 221 Blower Motor - Diagram 8W-42
- Blower Motor Repair

I hope help you with this (rated this help) Good luck.