Engine temp assistance needed...
Senior Member
Joined: Dec 2005
Posts: 435
From: United States
Exactly how did you check the relay? If all you did was check across the coil for continuity, did you reverse the leads and check for continuity in both directions? The relay has a diode across the coil so if the coil had opened up, you would still get continuity in one direction.
Did you energize the relay and check for continuity across the contacts?
Did you energize the relay and check for continuity across the contacts?
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Junior Member
Joined: May 2013
Posts: 6
Exactly how did you check the relay? If all you did was check across the coil for continuity, did you reverse the leads and check for continuity in both directions? The relay has a diode across the coil so if the coil had opened up, you would still get continuity in one direction.
Yes, and yes. The 'sw' was on pins 85 and 85, while the other two 30 and 87 were 12v/ground, I might have my terms wrong. But we used a Haynes manual. At one, we tested the relay, and heard the click/click of the switch inside.....
just to be sure, we swapped relay with the same type/brand, same issue.
Did you energize the relay and check for continuity across the contacts?
Yes, and yes. The 'sw' was on pins 85 and 85, while the other two 30 and 87 were 12v/ground, I might have my terms wrong. But we used a Haynes manual. At one, we tested the relay, and heard the click/click of the switch inside.....
just to be sure, we swapped relay with the same type/brand, same issue.
Did you energize the relay and check for continuity across the contacts?
Senior Member
Joined: Dec 2005
Posts: 435
From: United States
If you pull the relay and turn on the engine and turn on the AC, you should be able to get continuity from the forward outside pin to ground. If you are getting continuity, then you have a wiring problem.
BTW, when you turn on the AC, does the compressor come on? If so the relay inside the computer is working so it is the wire from the computer to the relay.
BTW, when you turn on the AC, does the compressor come on? If so the relay inside the computer is working so it is the wire from the computer to the relay.
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Junior Member
Joined: May 2013
Posts: 6
Update, issue solved
Issue is solved.
Turned out we tested the fan last weekend for about 3-5 seconds, it worked.
Today we were going to install sw for fan inside cab, but before we installed sw we tested fan one more time, nada....did not work. We banged on it and it started working, we gutted fan, turns out brushes were very worn down, new fan motor, 23.99 at Autozone, badabingbadabang, works each time every time now :0 Now I can have AC in Vegas again
Thanks for all that replied/assisted...when the fan worked no issues last week and intermittently this time, who knows.
Turned out we tested the fan last weekend for about 3-5 seconds, it worked.
Today we were going to install sw for fan inside cab, but before we installed sw we tested fan one more time, nada....did not work. We banged on it and it started working, we gutted fan, turns out brushes were very worn down, new fan motor, 23.99 at Autozone, badabingbadabang, works each time every time now :0 Now I can have AC in Vegas again
Thanks for all that replied/assisted...when the fan worked no issues last week and intermittently this time, who knows.
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