Relay clicking sound

[gurvir44]

Just finished installing a Hfs-3v.3 in my Audi A4 1.8T. When I start the car the water level light stays on even though there's enough water, decided to pull the float sensor and it got rid of the light. Now when I start it, light comes on for a few seconds, turns off and the rest of the gauge lights up. Once it hit the gas the guard lights turn off and I hear a rapid clicking sound like a relay. It does that till the RPMs go back to idle. Any suggestions?
I'll adjust the float and see if that takes car of the water light.

[Richard L]

Two things:
1. Check the arm of the level sensor is pointing up at 45 degrees with a full tank.
2. What wiring diagram did you use for the installation?

[gurvir44]

Originally Posted by Richard L

Two things:
1. Check the arm of the level sensor is pointing up at 45 degrees with a full tank.
2. What wiring diagram did you use for the installation?

Green wire to the - of the fuel injector ( Red with blue stripe for AMB 1.8T audi)
Red wire to the + of the fuel injector (Black with green stripe)
Used all factory grounds so they should be good too.

Will check the arm today.

[Richard L]

This is a 20V 1.8T, you may like to swap the red and green wire of of the ECU harness to the fuel injector (+) & (-) pins. See diagram below:

[gurvir44]

Originally Posted by Richard L

This is a 20V 1.8T, you may like to swap the red and green wire of of the ECU harness to the fuel injector (+) & (-) pins. See diagram below:

I used the continuity mode on a multi-meter to trace the wires back from the ECU to the fuel injector. You just want me to swap + to - and - to +?

[Richard L]

I couldn't make this any clearer with text and diagram.

[gurvir44]

Originally Posted by Richard L

I couldn't make this any clearer with text and diagram.

Thanks richard, i fixed everything with the solution you provided. I need a bit of help fine tuning now. Often times ill accelerate and the Low level water light will come on, along with the water injection light indicating fail safe mode. How do i fine tune it to avoid that? Do i use the SC on the display? Or the 3 turn dials inside the unit.

[Richard L]

you can set the Wl two clicks C-CW and let me know.

[gurvir44]

Originally Posted by Richard L

you can set the Wl two clicks C-CW and let me know.

Worked! Thank you!