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David N. · 10-22-2006, 04:24 PM

Thanks for the advice, I went in today and started testing, here's what I got:

In conditions where the car was idling at 0mph, coolant temp at 93 degrees Celcius, the following values were on Relay 8:

85 - 4V
86 - 13.5V
87 - 13.5V
30 - 0V

I shorted 30 to 87, fan did activate (which kinda figured cuz the fan does indeed work just not at the right times). Upon seeing 0 at terminal 30 first, I checked the B4 fuse, but it seemed to be fine. So I'm guessing at this point it's a bad relay. Anyone know what values at terminal 85 and 86 should cause 87 to close with 30? I guess they are cheap enough to replace and see, but given the nature of the compartment fan, I'm going to have a tough time ascertaining whether or not it's fixed outside of going on some spirited driving again.

BTW, it says '53' on top of the relay. Is that all I need to identify it for replacement?

10-22-2006, 04:24 PM	#3
David N. Registered User Join Date: Sep 2006 Location: Los Angeles Posts: 373	Thanks for the advice, I went in today and started testing, here's what I got: In conditions where the car was idling at 0mph, coolant temp at 93 degrees Celcius, the following values were on Relay 8: 85 - 4V 86 - 13.5V 87 - 13.5V 30 - 0V I shorted 30 to 87, fan did activate (which kinda figured cuz the fan does indeed work just not at the right times). Upon seeing 0 at terminal 30 first, I checked the B4 fuse, but it seemed to be fine. So I'm guessing at this point it's a bad relay. Anyone know what values at terminal 85 and 86 should cause 87 to close with 30? I guess they are cheap enough to replace and see, but given the nature of the compartment fan, I'm going to have a tough time ascertaining whether or not it's fixed outside of going on some spirited driving again. BTW, it says '53' on top of the relay. Is that all I need to identify it for replacement?