what does the switch solenoid control?
#3
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unplug/remove this sensor and the choke won't stay out.
#4
Round and Round
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Not really driven by the ECU. Blue/white wire goes direct from the #1 water temp switch to the choke magnet. Black/white wire to the #1 water temp switch gets 12V from ignition switch. When the water is below 158 degrees #1 WT switch closes, 12v goes to the choke switch magnet terminal and the magnet is energized. Above 158 #1 WT switch opens, no 12v to choke magnet. If you connect a wire from + coil terminal (ign 12v) to one terminal of the #1 WT switch and another wire from the other terminal to the appropriate terminal on the choke magnet the choke magnet would work like normal.
#7
1st-Class Engine Janitor
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Not really driven by the ECU. Blue/white wire goes direct from the #1 water temp switch to the choke magnet. Black/white wire to the #1 water temp switch gets 12V from ignition switch. When the water is below 158 degrees #1 WT switch closes, 12v goes to the choke switch magnet terminal and the magnet is energized. Above 158 #1 WT switch opens, no 12v to choke magnet. If you connect a wire from + coil terminal (ign 12v) to one terminal of the #1 WT switch and another wire from the other terminal to the appropriate terminal on the choke magnet the choke magnet would work like normal.
Likewise, both leads of the No 1 water temp switch go to pins D (the LB lead) and O (the BL lead) on the ECU, via B-10 (switch connector) and X-01 (engine harness connector). The BL lead also splits off in the body harness to go to the Hot Start relay.
There is no direct connection between the temp sensor and the choke magnet on a 1980 - - EXCEPT in the CANADIAN build, which (since this is all emissions stuff) is very different from the Fed/Cali builds.
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#10
Boosted Soon
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Likely from disturbing the wires. I just swapped an aluminum water pump housing for the extra hole to run a fan switch. Now that temp sensor leaks and the wires broke off. I was quite careful as well. I'm going to bypass it for now, and remember to push the choke lever back in when up to temp driving.
Last I checked that switch wasn't cheap.
Last I checked that switch wasn't cheap.
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Jeff20B
1st Generation Specific (1979-1985)
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09-16-18 07:16 PM