 Early heater fan wiring question, with bonus mystery wire |
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| r3dplanet |
 May 31 2012, 08:43 PM
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Senior Member  Group: Members Posts: 679 Joined: 3-September 05 From: Portland, Oregon Member No.: 4,741 Region Association: None  |
My car has never had heat in the time that I've owned it. The car is a 1971 but the engine and wiring in the bay are all for 1973.
I took the time to completely refurb an early blower fan. It has two wires: one brown, one green. According to the wiring diagram I'm supposed to have wires directly from the harness to power it. I don't. Where am I supposed to tap for power? Also, on the relay board I have a mystery green wire coming from astern. I have no idea what it's for. Any guesses? See photos for clarity. Thanks, Marcus    |
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| etcmss |
Jun 1 2012, 04:55 AM
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etcmss Group: Members Posts: 183 Joined: 20-April 06 From: Lancaster, Ky Member No.: 5,899 Region Association: Upper MidWest |
I'm working on this today. A 71 body and harness, early blower motor and 2.0 engine. (the engine isn't related just the harness used)
The relay board is a 71 with the normal green wire jumper on the 12 pin connector--pin 10 jumpers to 11 and sticks out as shown in photo previous. My fan turns on when applying power and seems to have the ground already there instead of through the heater lever. so i'm looking for the ground and will find power from the relay board. an extra pin connector with wiring helps. |
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| ThinAir |
Jun 5 2012, 12:15 AM
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Best friends Group: Members Posts: 2,543 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region 
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QUOTE(etcmss @ Jun 1 2012, 03:55 AM)  I'm working on this today. A 71 body and harness, early blower motor and 2.0 engine. (the engine isn't related just the harness used) The relay board is a 71 with the normal green wire jumper on the 12 pin connector--pin 10 jumpers to 11 and sticks out as shown in photo previous. My fan turns on when applying power and seems to have the ground already there instead of through the heater lever. so i'm looking for the ground and will find power from the relay board. an extra pin connector with wiring helps. I've got the same issue on my 73 2.0L. I had no fan, but had 2 leads coming out of the harness where it seemed clear that one was meanth to connect. I installed a fan, attached the wires, and the fan powered on even though the heater control was in the off position. I've completely disconnected the wire from the heater control, and it still behaves the same way, so it means there's a ground somewhere else. I haven't managed to track it down yet and have considered just running new wires to a separate switch since I'd really rather be able to turn the fan on/off independent of the lever. |
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Posts in this topic
spankmeister7 Early heater fan wiring question May 31 2012, 08:43 PM
McMark The 14 rolls of electrical tape on your harness se... May 31 2012, 08:55 PM falconfp2001 BTW nice engine bay. The circle is the harness tha... May 31 2012, 09:24 PM
spankmeister7 Thanks for the responses. As it is I have new Bowl... May 31 2012, 09:30 PM falconfp2001 Sorry, my bad. 73 comes from the 14 pin connector.... May 31 2012, 09:35 PM falconfp2001 BTW, whenever i have wiring problems this helps
h... May 31 2012, 09:38 PM Jeff Bowlsby Hi Marcus...so you're the Schpankmeister huh? ... May 31 2012, 10:15 PM spankmeister7
Hi Marcus...so you're the Schpankmeister huh?... May 31 2012, 10:52 PM r3dplanet By the time I finally got to matching up the parts... Jun 5 2012, 12:45 PM falconfp2001 Hey Marcus,
I'd like to take those block-off ... Jun 5 2012, 12:58 PM r3dplanet Certainly. It will be a week or so before I have m... Jun 5 2012, 02:14 PM etcmss got delayed on my repair due to hot water heater f... Jun 6 2012, 03:54 PM |
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