Heater cluster not working - ClubLexus - Lexus Forum Discussion

SC- 1st Gen (1992-2000)

Heater cluster not working


Old 03-12-18, 07:15 PM
Driver School Candidate
Thread Starter
Join Date: Mar 2018
Location: WA
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Default Heater cluster not working

Good evening,

I've researched all threads and still cannot find a answer.

​​​​​​we bought a 92 sc400 which did not come with a a/c and or stereo.

We've got a unit for a 96 sc400 and everything plugs right in but the a/c doesn't turn on. No back light nothing. The stereo also doesn't play any sound.

We've checked all fuses and they're great. Grounds are good, no shorted wires.

​​​ive read that the 96 models are completely different then all the rest

Is there a wire I can splice into or a way to bypass?
Vgoodie89 is offline  
Reply With Quote
Old 03-12-18, 09:27 PM
Lead Lap
iTrader: (24)
BiGEZ's Avatar
Join Date: Oct 2009
Location: Georgia
Posts: 740
Thanked 30 Times in 28 Posts

I think the heater control unit is different for the 92, you will need to get the correct unit for it to work. You should however, get power to the unit once it plugs in unless it is not working. Probe the AC and stereo harnesses with a DMM or 12volt tester to see if you are getting power to the unit. If not you have a blown fuses or disconnected harnesses.
BiGEZ is offline  
Reply With Quote
Old 03-13-18, 01:08 AM
O. L. T.
Keeper of the light
iTrader: (17)
O. L. T.'s Avatar
Join Date: Feb 2003
Location: My little world
Posts: 33,726
Thanked 4 Times in 4 Posts

White backed units and black backed units are not compatible.
O. L. T. is offline  
Reply With Quote

Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: