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Old 02-05-2014, 01:09 PM
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JamesDean JamesDean is offline
Electrical Engineer
Join Date: Apr 2005
Location: NE Ohio
Posts: 5,038
Originally Posted by funola View Post
I have taken both my 83 and 85 W123 300D PBUs apart to fix burned out traces and I can assure you they only have resistors, capacitors, diodes and relays, NO integrated circuits. The 85 300SD must use a different PBU than 83, 84, 85 300Ds.
I am confused. lol. I never said the PBUs contained ICs.

The blower control module and the temperature regulator unit do, but the PBUs are all simple components no ics.

The item from that thread was a blower motor controller, which has some ICs in it.
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