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Chat Area => General Car Chat => Topic started by: mcd840 on 08 January 2017, 17:08:45

Title: fixed towbars and reverse sensors
Post by: mcd840 on 08 January 2017, 17:08:45
hi, my signum has after market reverse sensors fitted so no button is in place to silence them, just wondering if when i have a towbar in place if they will interfere - just cars in general, omega signum etc etc

ta
Title: Re: fixed towbars and reverse sensors
Post by: Nick W on 08 January 2017, 17:13:07
I have cheap aftermarket sensors on my estate, and a fixed towbar. The sensors are quite high on the bumper, and there are mo problems.
If I'm honest, I didn't even consider there might be a problem when I bought the sensors ;D
Title: Re: fixed towbars and reverse sensors
Post by: Doctor Gollum on 08 January 2017, 20:25:37
hi, my signum has after market reverse sensors fitted so no button is in place to silence them, just wondering if when i have a towbar in place if they will interfere - just cars in general, omega signum etc etc

ta
Factory ones have a switch for disabling the PDC.

Might be able to fit a switch into the towbar wiring so that it silences the beeper when reverse is selected or when a trailer socket is plugged in... this depends on type of socket fitted but believe all have a rear fog light cut out switch... be easy enough to solve if it proves to be an issue ;)
Title: Re: fixed towbars and reverse sensors
Post by: Migv6 le Frog Fan on 08 January 2017, 20:38:12
Didn't know that. Where is this witch please ?
Title: Re: fixed towbars and reverse sensors
Post by: Doctor Gollum on 08 January 2017, 20:47:45
It's a pin on the inside face of the socket casing... 2a iirc :-\ either makes or breaks pin 2 connection... don't have one in front of me, so can't be 100% re pin, but definitely there :y
Title: Re: fixed towbars and reverse sensors
Post by: Andy B on 08 January 2017, 20:58:57
It's a pin on the inside face of the socket casing... 2a iirc :-\ either makes or breaks pin 2 connection... don't have one in front of me, so can't be 100% re pin, but definitely there :y

Correct. My 13 pin OE socket had one ..... that's why there are 2 fog light wire & a loop on the plug/socket in the boot  :y
Title: Re: fixed towbars and reverse sensors
Post by: Doctor Gollum on 08 January 2017, 21:02:07
It's a pin on the inside face of the socket casing... 2a iirc :-\ either makes or breaks pin 2 connection... don't have one in front of me, so can't be 100% re pin, but definitely there :y

Correct. My 13 pin OE socket had one ..... that's why there are 2 fog light wire & a loop on the plug/socket in the boot  :y
Which also explains why the factory wiring diagrams include both sides of said socket... pay for towbar prep when the car is built, and they include the plug to enable the dealer/towbar goon to wire it in without using scotchblocks 8)
Title: Re: fixed towbars and reverse sensors
Post by: Andy B on 08 January 2017, 21:16:03
It's a pin on the inside face of the socket casing... 2a iirc :-\ either makes or breaks pin 2 connection... don't have one in front of me, so can't be 100% re pin, but definitely there :y

Correct. My 13 pin OE socket had one ..... that's why there are 2 fog light wire & a loop on the plug/socket in the boot  :y
Which also explains why the factory wiring diagrams include both sides of said socket... pay for towbar prep when the car is built, and they include the plug to enable the dealer/towbar goon to wire it in without using scotchblocks 8)

I think that CANbus on newer cars has pretty much put a stop to those kind of installations
Title: Re: fixed towbars and reverse sensors
Post by: Doctor Gollum on 08 January 2017, 21:23:38
One can only hope...

That said, I don't relish the prospect of doing the wiring when I finally get a W140 :-X Sorting the ICE and fitting a towbar will be the first two jobs...
Title: Re: fixed towbars and reverse sensors
Post by: Andy B on 08 January 2017, 21:29:47
One can only hope...

That said, I don't relish the prospect of doing the wiring when I finally get a W140 :-X Sorting the ICE and fitting a towbar will be the first two jobs...

why does everyone quote their Merc model like that? I drive an R Class .... never call it a W251   :-\

Radios/COMAND seem to be as complicated as Merc could have made them ..... 'Audio 20' cover eleventeen flavours  ??? I asked on a Merc forum how much to fit COMAND to my R Class a few years back ..... £1000 and that was for a second hand unit. I use a TomTom  ;)
Title: Re: fixed towbars and reverse sensors
Post by: Doctor Gollum on 08 January 2017, 21:35:25
I wouldn't call it that either... the fat American perhaps ;D

Jesting aside, it helps differentiate between the older generation and the newer, rusty shit ;)

No nav on that, old school Becker and Bose, but one of the first automotive wholesale applications of Canbus wiring :D
Title: Re: fixed towbars and reverse sensors
Post by: Andy B on 08 January 2017, 22:16:55
I wouldn't call it that either... the fat American perhaps ;D
:P :P


... but one of the first automotive wholesale applications of Canbus wiring
As early as that
Title: Re: fixed towbars and reverse sensors
Post by: Doctor Gollum on 08 January 2017, 22:40:51
One of the reasons it cost so much to develop  ;)