Question about 1999 Jeep Grand Cherokee

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Fan control? When the fan control is on it tends to shut off then when i mess with the black box under the passanger side dash it works sometimes till it shuts off again. What is the black box called under the dash called so i can replace it?

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My 99 WJ did the same a couple of years ago. What happen is the electrical plug gets heated over time and looses contact with the pins inside the box that the plug fits into. Mainly because the terminals that push onto the pins inside the box are very light and get really hot. I don't know what it is called but I bet its not cheap! I showed the problem to the local auto sparky and the fix was easy.
1 Remove the plug. (NOTE COLOR OF THE WIRE GOING TO EACH PIN)
2 Remove the box by undoing the two screws and pry off the cover.
3 Solder three heavy gauge wires about 2-3" long directy to the three pins.
4 cover with heat shrink. Refit cover
5 Rejoin to to original wires with heavy male/female spade termials or simply use heavy crimp joiners.
6 Refit box with screws & secure any loose wiring with cable ties.

Posted on Jul 15, 2008

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