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YOUR RESEARCHRelay help with wiring for manual high speed fan switch 996
Leading reported evidence
Use phone connector
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Performed · outcome unconfirmed · Original poster
I'm using the phone connector to provide the 12v+ switched power to pin 4 on the switch and switch pin 5 and relay pin 5 are connected.
Relay help with wiring for manual high speed fan switch 996
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Leading evidence: 'Use phone connector' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect wire' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed · Original poster
Relay Pin 9, 10, 11, 13 - Ground (I used the Phone Connector Ground)
Relay help with wiring for manual high speed fan switch 996
Disconnect wire
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Suggestion
I would start by disconnecting the wire that goes from the Omron relay (pin 11) from the fan relay (85) and test it with a test light or voltmeter.
Relay help with wiring for manual high speed fan switch 996
Run radiator fans
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Suggestion · Original poster
Looking for some advice installing a latching relay to run both radiator fans.
Relay help with wiring for manual high speed fan switch 996
Test light or voltmeter
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Suggestion
I would start by disconnecting the wire that goes from the Omron relay (pin 11) from the fan relay (85) and test it with a test light or voltmeter.
Relay help with wiring for manual high speed fan switch 996
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8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Looking for some advice installing a latching relay to run both radiator fans. I followed Rick's post from the 986 forum
http://986forum.com/forums/diy-proje...em-switch.html
. I purchased a Omron MY2K-US-DC12 relay and also an extra 996 defroster switch to give it that oem look once working.
So I followed the direction Rick3000 lists in the link above but both fan start immediately after turning the ignition key to the first position. The switch LED works but the switch doesn't turn on or off the fans. I'm using the phone connector to provide the 12v+ switched power to pin 4 on the switch and switch pin 5 and relay pin 5 are connected. Also pin 3 from the cars actual defroster switch is used to provide the required LED neg/ground. Also all the grounds pins 8, 9, 10 and 13 are connected to the phone connectors brown ground wire. So I'm puzzled at why the switch isn't controlling the circuit/fans. I did remove and test the switch with another relay and it works. Below is the part of the directions I've followed. if anyone has any ideas on how to resolve my issues please let me know. The car is a MY99 C2.
.
Switch Pin 1 - Relay Pin 14
Switch Pin 2 - Relay Pin 12
Switch Pin 3 - Illumination Power from dash Defroster Switch Pin 3
Switch Pin 4 - 12V Switched Power from Phone Connector
Switch Pin 5 - Relay Pin 5
Relay Pin 9, 10, 11, 13 - Ground (I used the Phone Connector Ground)
Relay Pin 11 - Pin 85 Wire
Relay Pin 1 & 4 are not used
I did catch that at first, but I recall turning it off and the fans still started immediately upon turning the key. I will test again this evening before i over troubleshoot something that doesn't exist.
Thanks Jim for the link.
meirschwartz, I did try the setup last evening ensuring that the A/C was off, and still immediately after turning the key the high speed fans energized.
I would start by disconnecting the wire that goes from the Omron relay (pin 11) from the fan relay (85) and test it with a test light or voltmeter. first, make sure your switch and relay combination is working fine.
if you say that the light on the switch turns on and off, it indicates that the Omron is working as it should.
The approach OP is going with is the cleaner OEM look, but the location used in jim010's link is the perfect size for a toggle switch which you can wire to the relays directly, its a good/cheap alternative and gives you the fun of having a throwable switch. You do need some kind of backing plate to hold the switch in place, I 3d printed something for it, have been wanting to do a full switch setup like OP is going for to fill in one of the blanks on the dash but just can't get the motivation up to replace something which works ok.
This is a source reference. Confirm exact model applicability in the original material.
