ECU & Electronics Discuss electronics and related components within.

radiator wont come on. relays?

  #1  
Old 01-16-2018, 05:50 PM
Junior Member
Thread Starter
Join Date: Jan 2018
Posts: 2
Default radiator wont come on. relays?

hi there. I was having some over heating issues with my 2000 Toyota camry, 4 cyl 2.2. the thermostat wasn't opening up so I replaced that and it seemed to help a lot but the gauge still goes over the middle point. I noticed the radiator fans aren't coming on. I replaced the temperature sensor and the cooling fan switch, still they don't seem to come on. I used my ohm meter to check the relays. the resistance across the leads where power is supplied is about 100 ohms on fan one and about 88 to 90 on two and three. when I hook them up to a power supply the click on but when I checked for continuity across the leads that were closed one of them read about 1.5 ohms (on fan 3). I'm not sure if this is an issue. when I was burping the system the fans never came on and when I put the cap back on and let it idle they wouldn't come on. I revved the engine a little and the gauge started for the red zone but still the fans never came on. could it be a relay issue? what else should I check. one last note: when it started over heating while idling the fan one relay was hot to the touch, I don't know if that means anything. the test drive never got too far over the middle mark though.
 
  #2  
Old 01-16-2018, 07:08 PM
Super Moderator
Join Date: Jan 2008
Location: PTW
Posts: 11,742
Default

Do the fans turn on when the A/C is on and then the compressor cycles on?

Disconnect the electrical plug from the coolant temp switch on the bottom of the radiator. The fans should turn on.
 
  #3  
Old 02-20-2018, 04:25 PM
Junior Member
Join Date: Dec 2017
Posts: 27
Default

If you spin the radiator fan blades by hand (with the CAR OFF) and it stops/is hard to turn instead of continuing to spin, then I'm pretty sure the motor is toast.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Brad Baber
ECU & Electronics
7
01-16-2018 07:11 PM
cameroky
TCF Help & Suggestion Center
2
10-05-2016 08:48 AM
ewong1002
General Tech
1
02-12-2009 07:57 AM
KEVAUG
General Tech
19
02-28-2008 07:59 AM
alienated_man
ECU & Electronics
4
03-12-2007 03:39 AM


Thread Tools
Search this Thread
Quick Reply: radiator wont come on. relays?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

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.