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				No power to heater display has me stumped
			 
 
			Yesterday my heater display was blank when I started the car (2000 base 5-speed).Last thing I worked on was replacing the brake booster. When completed, the day before yesterday I went for a short test drive and did not notice if the heater display was working... it was working before the booster change. I don't see what the one could have to do with the other, and I am not sure of the timing of the problem.
 What I have done so far...
 Checked the relevant fuses, switched other relays for the relays that are involved, #9 and #18.
 I pulled the display/control unit out of the dash and checked that there was 12V on pin #9 and ground on pin #15 of connector D. For me this tends to confirm that the fuses and relays are OK.
 Since I have another 2000 Boxster hanging around in the driveway I pulled its display/control unit and plugged in the supposedly problematic one and it worked fine in the other car.
 So where do I go from here?
 
				__________________Grant
 Arctic Silver 2000 Boxster S - bought with a broken engine, back on the road with the engine replaced
 Green 2000 Boxster 5-speed and 1978 928 auto
 1987 924S 5-speed (Sold) - Blue 2000 Boxster 5 spd (Sold)
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