March 16, 2025, 02:43:12 PM

Author Topic: Coolant light/buzzer  (Read 2858 times)

Offline strickrothp

Coolant light/buzzer
« on: November 21, 2017, 09:13:40 PM »
My coolant light and buzzer have come on. After doing some research, I've read to get rid of this is to ground the brown coolant sensor wire.

The issue I'm having is that I'm not sure where it's located. The link in the diy fd harness thread in the how to section is dead and I can't find any pictures to help me locate where it is. Any kind of help would be appreciated

Offline Cobranut

Re: Coolant light/buzzer
« Reply #1 on: November 21, 2017, 09:24:31 PM »
You should be able to find that wire at the right front, in the vicinity of where the original coolant overflow tank is/was.
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline digitalsolo

Re: Coolant light/buzzer
« Reply #2 on: November 22, 2017, 09:35:39 AM »
You can ground it at the cluster as well, FWIW.
Blake MF'ing McBride
1988 Mazda RX7 - Turbo LS1/T56/ProEFI/8.8/Not Slow...   sold.
1965 Mustang Coupe - TT Coyote, TR6060, modern brakes/suspension...
2007 Aston Martin V8 Vantage - Gen V LT4/TR6060, upper/lower pullies, headers, tune.
2021 Tesla Model 3 Performance - Stock...ish.

Offline Skeltic

Re: Coolant light/buzzer
« Reply #3 on: November 22, 2017, 06:18:12 PM »
You can ground it at the cluster as well, FWIW.
Is it the brown white wire, or the brown yellow wire at the cluster?
Asking for a friend
"You can sleep in your car, but you can't race your house."

Offline strickrothp

Re: Coolant light/buzzer
« Reply #4 on: November 25, 2017, 01:14:41 PM »
I had a friend take a look at my car and he eventually found the wire to ground.

While he was looking over the car,  I did a little more searching; looking over the grannys site, the service manual and half spec's harness thread. You can locate the coolant sensor wire on the x-12 connector near driver side shock tower. Adding pics for a visual representation. Just throwing this out here just in case someone runs into this problem into the future and can't easily locate the wire.

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Offline Cobranut

Re: Coolant light/buzzer
« Reply #5 on: November 25, 2017, 07:20:58 PM »
If X-12 also has the Charge light wire, that is also where I grounded the coolant sensor wire.

When I installed my Megasquirt I repurposed the charge wire for a fuel pressure sensor.
To wire up the charge light I used the X-12 connector, and ended up with the beeper beeping.  At first I thought it was related to the charge light, :scratch: which made no sense, but after some searching through the FSM, I figured out it was the coolant beeper.
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.