Tailgate Microswitch Adjustment?

[100K+]

Originally Posted by John Underhill

There was continuity from the Microswitch brown wire to this tag which I presume is a broken glass sensor? This tag was not earthed or powered and I couldn't find a corresponding second tag anywhere round the window to complete a circuit!

I took a chance and routed the window brown wire tag to earth by splicing it to the adjacent rear screen heater thick black wire with scotch lock connectors. Everything is now back to normal and the alarm has been set for several hours without issue.

Can I assume that the brown wire window tag is the broken glass sensor which is faulty? I am assuming it is normally earthed through the heater element and alarms if the earth route is broken.

Grateful for confirmation of my thoughts and suitability of fix or otherwise please!

Cheers

John

This is where I was. I did similar to what you did. I have had no issues since I did this. The tag should I suspect be earthed but in my case was faulty connected hence the intermitant "hatch open" message and light when going over rough surfaces.


Cheers

Bob

[paolo]

Along these lines, I never get a tailgate open warning and the rear courtesy light doesn't come on,(bulb is fine).
Am I safe in assuming that the latch needs replacing?

[Chris_Rogers]

I'd suspect either the wire to the tailgate open signal has been shorted to earth either deliberately or accidentally, I'd be inclined to trace the wiring and find the cause before buying parts.

http://www.volvowiringdiagrams.com/?dir=

[100K+]

Originally Posted by paolo

Along these lines, I never get a tailgate open warning and the rear courtesy light doesn't come on,(bulb is fine).
Am I safe in assuming that the latch needs replacing?

The latch is a mechanical component with a microswitch ( for the hatch open signal) and a solinoid to lock the hatch.

Agree with Chris check the wiring back first - remember the wires change colour between the locking mechanism and the D pillar.

If its the micro switch and you are handy i'd attempt to get a micro switch from Maplins and adapt it.

Cheers

Bob

[fgx318]

hi there,

Just a quick contribution, mine (2004 v70) showed same message, I gave the module a twiddle and the message disappeared ! had the module grounded to the license plate ground wire and everything's back in order... thanks....

[moorlander]

Hi John, I just belatedly spotted your post. I have the same issue. Was your fix successful?
Cheers.

[Mr Obertshaw]

Just wanted to say thankyou. I've been suffering the open tailgate warning. Bridging the connections in broker window heater did the trick!