fan switch modification
#1
dorito spinner
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Location: South Jersey
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fan switch modification
on my rx-7 all i had to do was run 1 wire from the relay to a switch connected to ground in the cabin. Will this also work in the 8? if so where are the relays???
#2
Metatron
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![Cool](https://www.rx8club.com/images/icons/icon6.gif)
Not so simple....
There are two fans, A and B, one is larger than the other.
There are three relays that control them, 1, 2 & 3.
....but there are only two control wires from the ECU.
Wire "r/g" when grounded, runs fans A & B in series, (relay 1) slow speed.
Wire "w/l" when grounded, runs fan A alone, (relays 2&3) full speed.
Both wires grounded runs, predictably, A & B in parallel, (relays 1,2&3) full speed.
The relays are with all the other relays in the fuse box.
S
There are two fans, A and B, one is larger than the other.
There are three relays that control them, 1, 2 & 3.
....but there are only two control wires from the ECU.
Wire "r/g" when grounded, runs fans A & B in series, (relay 1) slow speed.
Wire "w/l" when grounded, runs fan A alone, (relays 2&3) full speed.
Both wires grounded runs, predictably, A & B in parallel, (relays 1,2&3) full speed.
The relays are with all the other relays in the fuse box.
S
#4
dorito spinner
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Join Date: Oct 2006
Location: South Jersey
Posts: 167
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Not so simple....
There are two fans, A and B, one is larger than the other.
There are three relays that control them, 1, 2 & 3.
....but there are only two control wires from the ECU.
Wire "r/g" when grounded, runs fans A & B in series, (relay 1) slow speed.
Wire "w/l" when grounded, runs fan A alone, (relays 2&3) full speed.
Both wires grounded runs, predictably, A & B in parallel, (relays 1,2&3) full speed.
The relays are with all the other relays in the fuse box.
S
There are two fans, A and B, one is larger than the other.
There are three relays that control them, 1, 2 & 3.
....but there are only two control wires from the ECU.
Wire "r/g" when grounded, runs fans A & B in series, (relay 1) slow speed.
Wire "w/l" when grounded, runs fan A alone, (relays 2&3) full speed.
Both wires grounded runs, predictably, A & B in parallel, (relays 1,2&3) full speed.
The relays are with all the other relays in the fuse box.
S
#5
Registered
If you can go 2 weeks without driving your car, the Racing Beat reflash would be an option. It keeps the car cooler with earlier fan activation, and gives a few extra HP up top for about $300.
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