From: Bruno on
I have a Grand Cherokee 2004 with a factory fitted towbar and
electrical hookup. I tow my Williams horse trailer with no problems,
but when I have unplugged the electrical hookup, I use my indicators
and they flash at double the speed.
You know how they flash when a bulb goes?

I have rectified the problem in the past by making sure the indicators
are in use as i unplug, but this doesn't seem to work now.

Maybe if I disconnect the battery or something?

Has anyone got any Ideas?

Thanks

Bruno
From: Mrcheerful on

"Bruno" <cb(a)alphaelectrical.fsnet.co.uk> wrote in message
news:72befb3b-617f-4796-9208-bab72bf854b1(a)d12g2000vbr.googlegroups.com...
>I have a Grand Cherokee 2004 with a factory fitted towbar and
> electrical hookup. I tow my Williams horse trailer with no problems,
> but when I have unplugged the electrical hookup, I use my indicators
> and they flash at double the speed.
> You know how they flash when a bulb goes?
>
> I have rectified the problem in the past by making sure the indicators
> are in use as i unplug, but this doesn't seem to work now.
>
> Maybe if I disconnect the battery or something?
>
> Has anyone got any Ideas?
>
> Thanks
>
> Bruno
>

are ALL the indicators actually working at double speed? there may be a
switch in the socket that disconnects the rears on the car when the trailer
plug is inserted.


From: Bruno on
On 29 May, 09:43, "Mrcheerful" <nbk...(a)hotmail.co.uk> wrote:
> "Bruno" <c...(a)alphaelectrical.fsnet.co.uk> wrote in message
>
> news:72befb3b-617f-4796-9208-bab72bf854b1(a)d12g2000vbr.googlegroups.com...
>
>
>
>
>
> >I have a Grand Cherokee 2004 with a factory fitted towbar and
> > electrical hookup. I tow my Williams horse trailer with no problems,
> > but when I have unplugged the electrical hookup, I use my indicators
> > and they flash at double the speed.
> > You know how they flash when a bulb goes?
>
> > I have rectified the problem in the past by making sure the indicators
> > are in use as i unplug, but this doesn't seem to work now.
>
> > Maybe if I disconnect the battery or something?
>
> > Has anyone got any Ideas?
>
> > Thanks
>
> > Bruno
>
> are ALL the indicators actually working at double speed?  there may be a
> switch in the socket that disconnects the rears on the car when the trailer
> plug is inserted.- Hide quoted text -
>
> - Show quoted text -

Yes All the indicators on the Vehicle are flashing at double speed
when the trailer has been dixconnected.
No signs of a switch in the plug
From: Harry Bloomfield on
Bruno formulated the question :
> I have a Grand Cherokee 2004 with a factory fitted towbar and
> electrical hookup. I tow my Williams horse trailer with no problems,
> but when I have unplugged the electrical hookup, I use my indicators
> and they flash at double the speed.
> You know how they flash when a bulb goes?

If this has been wired correctly via the CAN-bus - then I would suspect
the CAN-bus is becoming confused. It thinks the trailer is still
connected and flashing the indicators at double speed to warn you it
has noticed a lamp failure on the trailer.

I have just fitted a full tow pack (proper CAN-bus type)on my Rover and
its CAN- bus initially became quite confused. Part of the installation
process is to disconnect the battery, to get the CAN-bus to notice the
new controller module for the trailer is fitted.

Once installed I plugged it into my caravan to test it, found
everything worked as it should then unplugged. After which my reversing
sensors didn't work. The CAN-bus seeing a trailer connected turns off
the reversing sensors, then is supposed to put them back on when you
unplug.

Everything went back to normal the next day and has worked absolutely
fine since then.

I would be inclined to suggest disconnecting the battery and leaving it
off for 30 minutes to reboot the CAN-bus.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk