Enable Horn Honk when Locking

[RobG]

I'm wondering if there is another setting somewhere that I'm not seeing, the horn beeps twice when I unlock and the lights blink, but I only have the lights when I lock it. I would rather hear the honk when I'm walking away instead of approaching the car. Ideas?

[MechEngg]

Re: Enable Horn Honk when Locking

My mk4's have always honked only on locking, never on unlocking. You might want to check some simple things such as your hood microswitch or hatch microswitch, because if those are bad then it will not allow the horn to beep when you are trying to lock the car.

[Geobmx4life]

Re: Enable Horn Honk when Locking

If you've enabled the horn and it doesn't honk when locking, you most likely have a bad micro switch. Mine hasn't worked for about a year.

[RobG]

Re: Enable Horn Honk when Locking

I have a new drivers door lock module and the lights on both doors work when the doors open. I'm pretty sure the alarm part is working because the red light on the door flashes, but I'll check the hood pin switch too.

[MechEngg]

Re: Enable Horn Honk when Locking

I have a new drivers door lock module and the lights on both doors work when the doors open. I'm pretty sure the alarm part is working because the red light on the door flashes, but I'll check the hood pin switch too.

Yes the doors will lock, the pins will be pulled down, the red light will flash and the doors will be armed. You just won't hear the beep until all of the microswitches are closed. It seems like a failsafe just incase you leave one of your doors or hood open so that you take notice that there wasn't a beep and look into the issue further.

[RobG]

Re: Enable Horn Honk when Locking

Ah, makes sense, I'll investigate further tonight. I'll try to open the hood with the car "locked" and see if I get an earful.

[RobG]

Re: Enable Horn Honk when Locking

Kay, hooked up the VAG-COM, says hood is open regardless of position of switch, I unhooked the connector behind the headlight and confirmed the switch is working with a multi-meter. I then connected the pins and still couldn't get it to show a "closed" position. I'm guessing the wires just go back to the convenience module? I'm trying to think of another failure point?

[MechEngg]

Re: Enable Horn Honk when Locking

That sucks, but at least you know the problem or what to diagnose next. There is a connector, make sure the pins are ok on it. Then just follow wires back to see if a wire is broken at all.

[Stonewall]

Re: Enable Horn Honk when Locking

My guess is it is corroded where the hood switch cable meets the cable that goes to the convenience module. It really isn't in a good place.

[CGDoig]

Re: Enable Horn Honk when Locking

What Brent said. MKIV's are getting old now as much as we'd hate to admit it. I'd take the multimeter and try testing up the wire. Good chance its corroded at that connection though.

[RobG]

Re: Enable Horn Honk when Locking

I finally decided to poke around in this again, the hood switch was okay, but the radio is also wired into the same signal wire. When the hood is opened, the switch closes and connects the wire to ground. I don't know for sure, but from the wording from the Bentley, one of the lock tabs on the radio also has a ground contact switch so when you insert the radio keys and try to remove the it, the contacts are closed and setting off the alarm. The car would Honk with the radio unplugged, so I just put some tape over the tab on the back of the radio as you would on the headlight switch to diable the DRL's.