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Thread Tools | Display Modes |
11-03-2013, 12:59 PM
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#1 |
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Registered User
Join Date: Oct 2011
Location: Plumas Lake, CA
Posts: 386
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ohoh, relay getting HOT
The blue wire going into the blower motor relay is obviously building some heat. Any idea? All I have is off or HIGH on the selector at the dash now in my factory AC truck.
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11-03-2013, 01:05 PM
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#2 |
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Registered User
Join Date: Jun 2012
Location: Meeker, ok
Posts: 146
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Re: ohoh, relay getting HOT
I'd start by changing out the relay. Check the resistor too.
__________________
Trevor 74 C20...work in progress. 04 Saturn Ion...Daily Driver |
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11-03-2013, 02:17 PM
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#3 | |
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Registered User
Join Date: Oct 2011
Location: Plumas Lake, CA
Posts: 386
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Re: ohoh, relay getting HOT
Quote:
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11-05-2013, 12:09 PM
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#4 |
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Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: ohoh, relay getting HOT
On the blower housing. Its probably pooched. It's that thing the wire harness plugs in to that's held in by 2 screws.
__________________
-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square" 
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12-04-2013, 11:03 PM
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#5 |
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Registered User
Join Date: Oct 2011
Location: Plumas Lake, CA
Posts: 386
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Re: ohoh, relay getting HOT
So, I now have swapped both the resistor and the relay. I know have very week lower speed and ZERO high speed.
Should I start shooting for voltages? check the ground? What else should I try? |
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12-04-2013, 11:08 PM
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#6 |
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Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: ohoh, relay getting HOT
Check your switch
There should be 12v coming into the switch, and 12v leaving the switch on all speeds. The resistor drops the 12v to different voltages for the different speeds.
__________________
-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"
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12-04-2013, 11:36 PM
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#7 |
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Registered User
Join Date: Oct 2011
Location: Plumas Lake, CA
Posts: 386
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Re: ohoh, relay getting HOT
Im starting to think the new switch and bezel I got from LMC is defective. The harness area at the switch is definitely warm to the touch and before I really had any issues, I would have to jiggle the switch around in the high setting to get it to "set" and work.
A little irritated cause now I'll have to pull the dash back out to troubleshoot. |
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12-05-2013, 02:50 AM
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#8 |
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Another Day, Another Dollar
Join Date: Nov 2008
Location: North Vancouver, BC
Posts: 1,316
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Re: ohoh, relay getting HOT
Get used to it. I can't even count how many times my dash has been apart
__________________
-78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"
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12-05-2013, 02:53 AM
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#9 |
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Registered User
Join Date: Jul 2011
Location: WV
Posts: 946
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Re: ohoh, relay getting HOT
Go through and check your terminals. The ones in the picture look a little bit crusty. Extra resistance will give you problems too.
__________________
72 GMC C2500 402/Th400 first truck (still have) 77 GMC C3500 CC dually Sold  70 C50 dump truck "Rusty" 87 K10 Suburban Sold 93 K2500 xcab 6.5TD 96 GMC K2500 Suburban 6.5 TD |
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12-08-2013, 12:55 PM
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#10 |
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Registered User
Join Date: Oct 2011
Location: Plumas Lake, CA
Posts: 386
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Re: ohoh, relay getting HOT
Are there new wire harnesses available anywhere for the A/C and heater system? I'm thinking about just swapping over to a Vintage air kit. The grounds are good now. Im starting to wonder if I got a defective new switch and bezel from LMC, I didnt have any issues until I installed the new one.
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