WP safety light

**BALLSS** · 11-15-2015, 06:55 PM

My $02 is watch the gauge that came with the car

I have had a EWP for 17 years. wired it to 12vdc key on with a relay. IMHO doing good wiring with weather-pac connector and watching your temp gauge is all you need

***popo8*** · 11-15-2015, 08:34 PM

Originally Posted by BALLSS

My $02 is watch the gauge that came with the car

I have had a EWP for 17 years. wired it to 12vdc key on with a relay. IMHO doing good wiring with weather-pac connector and watching your temp gauge is all you need

Well said. Mine is set the same way. Key on... and it circulates. Had the fuse blow on it one time... didnt take much to notice the temp guage climbing... pulled over... replaced fuse... good to go.

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**harner** · 11-16-2015, 08:52 AM

Haters gonna hate lol.

I have an EWP that is wired to key on power. I also have a dummy light. I believe we used this diagram to wire it up:

When I was troubleshooting overheating issues with my car, it came in handy at times. But, I would never rely on it. The dummy light is part of my switch panel, along with ecutout, line lock, nitrous arm/heater/opener/purge.

**zooguy** · 11-17-2015, 12:31 AM

Originally Posted by Spartan7

I use 2 relays in mine. One to turn on the WP with 12 switched from the fuse block, and the other for the "dummy" light. If you're wiring inept, I suppose I could scribble something up, but I went off someone else's recommendation for mine. But basically the dummy light relay has the LED/light wired to 87a and the coil side spliced inline to the WP leads. That way, if the WP circuit goes open on either voltage or ground, the dummy light relay de-engergizes, supplying voltage to 87a, and turning on the light.

can you draw that out for me?

**zooguy** · 11-21-2015, 02:16 AM

@Spartan7

**zooguy** · 11-21-2015, 02:18 AM

Originally Posted by Spartan7

I use 2 relays in mine. One to turn on the WP with 12 switched from the fuse block, and the other for the "dummy" light. If you're wiring inept, I suppose I could scribble something up, but I went off someone else's recommendation for mine. But basically the dummy light relay has the LED/light wired to 87a and the coil side spliced inline to the WP leads. That way, if the WP circuit goes open on either voltage or ground, the dummy light relay de-engergizes, supplying voltage to 87a, and turning on the light.

any help with this?

**Dan Clarke** · 11-23-2015, 11:27 PM

Wonder if there is a sensor that would feel for water movement that could be inserted into the water flow somewhere.

I'm putting one in a circle track car and will have more stuff to pay attention to than a gauge so I'm interrested in a light too.

Dan

**BALLSS** · 11-25-2015, 12:24 PM

Don't know about a inline sensor that "feels" water....although a Autometer temp sensor & light (#3247) could be plumbed "T" into the cooling system (off WP heater in/out)...or the relay schematic posted

I guess a "light" vs gauge in a race only car would be helpful

for a street and occasional 1/4 mi car, IMHO a gauge is fine. Whatever your personal opinion is you have options.

**RichS** · 11-26-2015, 09:11 PM

I have mine wired to come on with the key, and a indicator light to be on when when there is power to the pump. I also have an adjustable timer circuit that I turn on to run the pump and my 2 fans (on low). I can set for 1-30 min then they will shut off. One problem was at the last race my pump was stopping but the light was on. I started to overheat on the starting line but didn't notice because the check Gage light on the Vette doesn't come on till around 250. I'm thinking or putting a current sensor on the wire to sense a current draw and turn on a led for proof.

**harner** · 11-27-2015, 08:35 AM

I have a stock gauge, autometer temp gauge, and a dummy light. Neither gauge tells you when the ewp stops working. The light showed it's worth it during the first 30 minutes of troubleshooting a cooling issue. Ended up being a fuse issue, but when everything is new and different, it's a PITA figuring out what's wrong.