Notices
SC - 1st Gen (1992-2000)

Electrical issues?

Thread Tools
 
Search this Thread
 
Old Sep 6, 2012 | 02:49 AM
  #1  
R3Y's Avatar
R3Y
Thread Starter
Rookie
 
Joined: Sep 2010
Posts: 57
Likes: 0
From: Florida
Default Electrical issues?

guys, im having a very weird issue.cigarrete lighter AND my AC aren't working. any ideas?
the AC controls work fine and the fans work too, but the compressor isnt turning on. i checked the system does not need to be recharged.
Help!
Reply
Old Sep 6, 2012 | 02:09 PM
  #2  
tinman's Avatar
tinman
Intermediate
 
Joined: Nov 2003
Posts: 266
Likes: 2
From: Oswego, IL
Default

One assumes they are not related. Do you have a light in your ash holder? Does that light come on? If not, check the fuse and the cable in the back of the lighter/ash holder assembly.

Your AC issue is probably not related. There is no common fuse or system that i'm aware of that would couple the compressor and the cigarette lighter.

If you have a multi-meter I'd suggest taking the relay and fuses out (you can find which ones in the owners manual) for the A/C compressor and testing them.
Reply
Old Sep 6, 2012 | 02:21 PM
  #3  
SC400slide's Avatar
SC400slide
In Recovery Mode
CL Folding 25,000
iTrader: (11)
 
Joined: Apr 2012
Posts: 3,871
Likes: 36
From: NM
Default

Well try replacing the cigarette lighter fuse anyway see if it does anything. Are yo sure the A/C controls are working? Maybe relays under the hood....let us know.
Reply
Old Sep 6, 2012 | 02:27 PM
  #4  
tinman's Avatar
tinman
Intermediate
 
Joined: Nov 2003
Posts: 266
Likes: 2
From: Oswego, IL
Default

Originally Posted by SC400slide
Hey tinman, actually there is. When my LCD A/C wasn't working at all, I looked around on the internet and found out that if the cigarette lighter fuse is out, the LCD controls won't work at all. Replaced fuse, good as new.
Do you smoke?
While this is important information for some troubleshooting, there is no common fuse for what the poster is referring to. I'm aware that the panel controls and lighting may have something in common, but the poster indicates that this A/C controls are working fine (see his post), the compressor just won't turn on. Thus, the issue becomes a common fuse between the compressor and the cigarette lighter, not the control panel (note that I said compressor in my first post, not A/C control panel). First stop would be checking the pressure in the system and making sure that matches a pressure chart for R-134a, assuming this car is 1995 or newer, R-12 if older than 1995. poster indicated that it was charged. Next step would be to see if the clutch relay was engaging and activating the A/C clutch.
Reply
Old Sep 6, 2012 | 03:48 PM
  #5  
SC400slide's Avatar
SC400slide
In Recovery Mode
CL Folding 25,000
iTrader: (11)
 
Joined: Apr 2012
Posts: 3,871
Likes: 36
From: NM
Default

^My bad, I edited it out. I was referring to an incomplete circuit...
Reply
Old Sep 6, 2012 | 05:09 PM
  #6  
R3Y's Avatar
R3Y
Thread Starter
Rookie
 
Joined: Sep 2010
Posts: 57
Likes: 0
From: Florida
Default

they both went bad at the same exact time. thats why i ask.
thanks for the help so far guys!

Last edited by R3Y; Sep 6, 2012 at 05:58 PM.
Reply
Old Sep 8, 2012 | 08:59 AM
  #7  
R3Y's Avatar
R3Y
Thread Starter
Rookie
 
Joined: Sep 2010
Posts: 57
Likes: 0
From: Florida
Default

OK so i managed to fix the cigarette lighter. BUT i still cant pinpoint the issue with the AC compressor... i ran a diagnostic check on the AC ECU and no codes came up, but there is no voltage being fed to the ac compressor... im stuck guys... i dont know what else to do...
Reply
Old Sep 8, 2012 | 11:07 AM
  #8  
SC400slide's Avatar
SC400slide
In Recovery Mode
CL Folding 25,000
iTrader: (11)
 
Joined: Apr 2012
Posts: 3,871
Likes: 36
From: NM
Default

Look at the A/C electrical harness down by the refrigerant lines, see if it's plugged in or loose...
Reply
ClubLexus Stories

Celebrating Lexus & Toyota from Around the Globe

story-0

10 Lexus Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-1

8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

 Michael S. Palmer
story-2

10 Best Lexus Models No One Remembers

 Joe Kucinski
story-3

TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

 Michael S. Palmer
story-4

Top 10 Lexus & Toyotas to Drive Before You Die!

 Joe Kucinski
story-5

Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

 Joe Kucinski
story-6

Lexus LC500 Convertible Auction: A Preview of Rising Values?

 Brett Foote
story-7

GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

 Michael S. Palmer
story-8

9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

 Joe Kucinski
story-9

2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

 Brett Foote
Old Sep 8, 2012 | 09:41 PM
  #9  
tinman's Avatar
tinman
Intermediate
 
Joined: Nov 2003
Posts: 266
Likes: 2
From: Oswego, IL
Default

how did you determine that there is no voltage being supplied to the compressor clutch? If there really is no voltage, then it's not a compressor or clutch problem. Did you test the relay? Do you know how to test a pressure switch? That would probably be the next step. I would suggest looking at http://bahamutcars.free.fr/workshop/...nts/index.html (only works in Internet Explorer) Repair -> Air Conditioning or find a shop.
Reply
Old Sep 9, 2012 | 08:22 PM
  #10  
R3Y's Avatar
R3Y
Thread Starter
Rookie
 
Joined: Sep 2010
Posts: 57
Likes: 0
From: Florida
Default

Originally Posted by tinman
how did you determine that there is no voltage being supplied to the compressor clutch? If there really is no voltage, then it's not a compressor or clutch problem. Did you test the relay? Do you know how to test a pressure switch? That would probably be the next step. I would suggest looking at http://bahamutcars.free.fr/workshop/...nts/index.html (only works in Internet Explorer) Repair -> Air Conditioning or find a shop.
i did it with a multimeter. and negative on the relay. will do so soon. thanks!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Segzy14
RX - 2nd Gen (2004-2009)
0
Jul 18, 2018 01:00 PM
ironwalt
SC - 1st Gen (1992-2000)
5
Sep 8, 2016 07:08 PM
Wicked GS
SC - 1st Gen (1992-2000)
2
Sep 24, 2009 04:42 PM
Carfreak70
SC - 1st Gen (1992-2000)
3
Aug 31, 2008 03:01 PM
tuterz
SC - 1st Gen (1992-2000)
9
May 28, 2008 11:29 PM




All times are GMT -7. The time now is 03:07 PM.

story-0
10 Lexus Designs That Have Aged Like Fine Wine

Slideshow: Some luxury cars chase trends, but these Lexus models look better now than they did when they first rolled into showrooms.

By Verdad Gallardo | 2026-05-06 17:58:29


VIEW MORE
story-1
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!

Slideshow: How to Get the Best Fuel Economy with a Hybrid and Plug-In Hybrid!

By Michael S. Palmer | 2026-05-05 20:54:44


VIEW MORE
story-2
10 Best Lexus Models No One Remembers

Slideshow: 10 best Lexus models no one remembers.

By Joe Kucinski | 2026-05-05 17:33:28


VIEW MORE
story-3
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing

Slideshow: diving into 4Runner TRD Off-Road Premium's pricing, performance, fuel economy, features, and amenities!

By Michael S. Palmer | 2026-04-23 13:09:18


VIEW MORE
story-4
Top 10 Lexus & Toyotas to Drive Before You Die!

Slideshow: the 10 Lexus and Toyota vehicles you need to drive before you die.

By Joe Kucinski | 2026-04-23 10:34:24


VIEW MORE
story-5
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation

Slideshow: Top 10 Lexus/Toyota models with the lowest 5-year depreciation rate.

By Joe Kucinski | 2026-04-08 12:19:06


VIEW MORE
story-6
Lexus LC500 Convertible Auction: A Preview of Rising Values?

The LC hasn't even disappeared from the Lexus lineup yet, and we're already seeing signs of an explosive market.

By Brett Foote | 2026-04-06 09:25:02


VIEW MORE
story-7
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler

Slideshow: comparing the pricings, specs, power, fuel economy, fun-factor, and features of the GX 550 Luxury+ and TX 550h+ Luxury.

By Michael S. Palmer | 2026-03-19 13:44:11


VIEW MORE
story-8
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)

Slideshow: 9 best Lexus models you can buy for half price and 1 you should avoid

By Joe Kucinski | 2026-03-19 12:01:07


VIEW MORE
story-9
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!

Here's everything you need to know about the latest NX.

By Brett Foote | 2026-03-19 11:56:59


VIEW MORE