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I have fitted a towbar to my 2003 Vectra 1.8 which was easy. The problems I have had have been wiring it.It seems be working ok on the driveway.But when I drive off and touch the brakes (not always the first time) the bulb failure light comes up on the dashboard. Sometimes it is the left brakelight and sometimes it is the right. If I turn the ignition off and then on again it seems to reset until I touch the brakes again.

Do I need a 7 way split relay or a smaller one as it only seems to be the brakes???

P.S I forgot to mention that the trailer is hitched at the time.

 the vectra's as with many modern electronics in cars need a dedicated wiring loom,thats plugs into the cars wiring inside panel in the boot/tailgate are.

 the circuits on the car are set up for installing a loom such as this,just one extra cable req. to connect to power dis. point on main circuit.

 you will get this fault every time until you instal correct wiring system.

It can be done with relays but I believe car specific wiring looms allow this to be overcome without using relays.

I obtained my car specific kit for my Skoda Superb from Towequipe and had no such problems. They are an excellent company.

Dave