Fan speed switch 90 TR

Here are some part numbers of the Speed Control Unit from Table 121.
134128 Fan speed regulation unit. For conditioner PN 134131 - Until car No. 79903, This is an early style TR AC switch with 6 wires/6 pins and external fuse holder. (Later style switches have 4 pins/4 wires, pn: 140151). No price.
131473 Fan speed regulation unit. For conditioner PN 60955900, used on Euro 1987 and US 1990. No price.

140151 Fan speed regulation unit. Starting from car no. 79904, Later style switch with 4 pins/4 wires, pn: 140151, PRICE 429.61

This item is used in the following applications:
Vehicle--- Quantity--- Table---- Location--- Parts Diagram
512TR ---- 1 --- 122 --- 25---- INSTRUMENTS AND PASSENGER COMPARTMENT ACCESSORIES
Mondial t--- 1--- 151--- 14--- AIR CONDITION SET
Testarossa----1--- 121--- 21--- INSTRUMENTS AND PASSENGER COMPARTMENT ACCESSORIES (FOR US VERSION)
(1990)

 

Thanks, pulling together on this stuff is what makes ownership of these cars more rewarding (and affordable).

Don't go to the Dealer for this stuff.
It's easier and probably cheaper to get it from our forum sponsor like Ricambi.
T.Rutlands may have a used one as well as GT Car Parts in AZ (516 W Lone Cactus Dr, Phoenix, AZ 85027 (623) 780-2200)

 

I wouldn't assume that this is the case just yet -- try replacing the power transistor first (mounted in the center air outlet if a mechanic hasn't moved it). If you do a search on "TR power transistor", you should get plenty of prior threads.

 

Thank you, I had forgotten about that.
For 1990
Table 127 (Table 125 for 1987)
P/N 127014, $103.02
Labor to change it out , "One million dollars"

 

Not sure what it takes to get it out but I heard it isn't fun. One fix I heard is to move it from the factory location closer to one of the vent outlets (or something like that) so it can be changed out in the future without tearing the whole car apart.

 

If your dash is unmodified, it shouldn't be that bad -- just requires pulling the center vent structure out (the panel beneath it should pivot open to allow you to release the clips).

 

Glad to hear that you got it sorted without too much pain -- I'd say that you had the easiest fix so far

One thing that you can do to help prevent a future problem with the power transistor is avoid operating at 3/4~7/8 fan speed -- i.e., use any speed from minimum to ~1/2, but, for anything higher, go full speed. It's human nature IME to "turn it down just a little" as "maximum" never seems like a good idea, but, in this case, it's far better for reliability to run at maximum (which puts the large fan motor current thru the relay) rather than just below maximum (which puts the large fan motor current thru the power transistor).

 

Please clarify - is it correct that the leather panel hinges on the bottom and the top portion adjacent to the vent should tilt out and away from the dash? Just pull out at the top of the leather panel?

The panel on my 1990 seemed pretty well 'fixed' in place - just want to be sure before I induce that dreaded snapping noise!

Thanks to all,
Vince

 

I wish I could. Mine was very poorly modified into a "fixed" mounting before I purchased it -- so you are right to be cautious IMO. I had to remove the knee pad brace below it to be able to remove that lower panel and replace my power transistor rivets.

 

+1 The shelf had to come out of mine prior to me being able to get it to open.

 

Thanks for the clarification.
Mine is still working correctly but nice to know for the future.

 

Thanks for all the input!