I can't figure out my blower issue for 2000 Jeep Wrangler Sport
I have already tried replacing blower resistor, blower switch, relay, and blower motor itself. Still getting nothing......I am not a seasoned car guy but I am trying to learn. Any suggestions would b e greatly appreciated.
X3 on test light...TJ electrics are much "safer" than regular household or some other vehicles that can "hold" a charge or just have more current to begin with....as long as you use a test light, and think ground/ and hot with your test light completing the circuit you can chase it down....but sometimes it is a PIA!!!
If you've got power to the blower motor, the issue is going to be on the ground side. The ground circuit for the blower motor goes through the mode switch... that's another common point where terminals can burn. Unplug that little 3-wire connector on the back of the mode switch... if it's melted, it has issues.
2000 Wrangler Sport - "Red" - Stock
1999 Z-28 - "The GLUMAKR" - Not Stock
"Mid-life crisis? Pfffffttt... more like a whole-life crisis."
Riptide is right usually the mode switch or the 3 wire connector. Here is a test procedure but good to check the back of the mode switch first.
As stated you need either a 12v test light or a volt meter. Both are inexpensive tools you should have as a jeep owner. Start by checking for power (12v) at the blower motor with the key on. If no power most likely the fuse is blown. Check fuse #1 in the PDC (box in front of the battery). Less likely but also check fuse #8 in the fuse block behind the love box.
If you have power to the motor then you are probably losing the ground path to the motor. To check that connect the test light or meter to a power (12v) source & probe the negative (ground) wire at the motor. The easiest way is to use a meter & probe the 2 wire connector at the motor. One lead to the power & the other to the what should be the ground wire. If no ground (MOST LIKELY REASON THE BLOWER IS NOT WORKING) then most of the time the “lost” ground is at the mode switch. Check the 3 wire connector there for melting or loose connection. If the connector is burnt or melted try wiggling it to see if you can at least get it to work a little. If no sign of excessive heat pull the connector off & jump between the green & black (2 heavy gauge) wires & see if it works (key on) & try all 4 speeds. To jump those 2 wires bend a piece of wire or a paper clip & insert the ends into those 2 terminals of that 3 wire connector. If all are now working with a jumper you need a mode switch. If you can get a melted connector to work the blower then at least the mode switch is good & you “only” need to fix the connector.