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Registered
Join Date: Feb 2021
Posts: 10
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Black Relay/Fuse in engine bay
Hi Guys I have a 1977 911 and wondering if anyone can explain what this Black round 5 pin fuse/relay actually does Its says both on this diagram and in my User manual that it is : AIR FLOW SENSOR/CHARGING PRESSURE RELAY , I have traced all wires coming from the air flow meter and there are only 2 wires coming off that one goes to ground and one goes to brown and black wires off the harness and I do know the purpose for those wires. I am wondering if anyone could shed some light on the purpose of the black
5 pin relay thanks in advance!!  
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05-08-2021, 06:04 AM
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Join Date: Dec 2014
Posts: 13,860
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I believe it controls fuel pump through metering plate
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05-08-2021, 06:50 AM
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ROW '78 911 Targa
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It is the relay for the Engine mounted blower motor for heat.
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Dennis Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds. Last edited by timmy2; 05-08-2021 at 12:30 PM.. |
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05-08-2021, 07:14 AM
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Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
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That diagram is for a turbo.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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05-08-2021, 09:16 AM
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930 engine bay fuse panel.......
Quote:
Tony |
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05-08-2021, 11:34 AM
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Join Date: Feb 2021
Posts: 10
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Thanks guys !!
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05-08-2021, 03:58 PM
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Heinz
