Tow bar Electrics Question is. Is TEB7AS bypass necessary?

Abott10 · 30th May 2017, 17:41

Have fitted Witter "Stowbar" kit to two of my ZTs. No electrics so far.

Is it best to fit a Bypass module or simply Scotch Block to the boot's wiring loom?

When removing a Tow Bar from a 75 in a local breaker yard, I also took the connected Bypass Module and all its wiring. Even the terminals on the module are labelled.

So any answers and hints here will be greatly appreciated. Thanks in advance.

Annie · 30th May 2017, 18:09

the teb7as is needed. sets of bulb failure if not. I fitted mine along with the towbar a few weeks ago by myself in about an hour so really easy to do, just scotch lock into the wiring loom in the boot

humphshumphs · 30th May 2017, 18:17

When I fitted my towbar, I used a bypass relay to stop the canbus having a fit.

I cut, soldered and crimped all the wires so I don't have any issues that can happen with scotchlocks.

MatP2 · 30th May 2017, 18:37

Definitely use the relay, definitely don't use scotchlocks.

minimutly · 30th May 2017, 20:44

I never used the relay - no issues..

anddyy · 30th May 2017, 20:48

Quote:

Originally Posted by minimutly

I never used the relay - no issues..

+1

Done 2 zt's this way without problems, never had any bulb failure warning issues when hooked up either.

steve-45 · 30th May 2017, 22:53

I installed the relay - just to be sure.

And also used the heavy power lead that I ran from the fusebox to the boot to power an auxiliary power socket in the boot.

Useful for all sorts of things.

Robti · 1st June 2017, 07:39

Quote:

Originally Posted by steve-45

I installed the relay - just to be sure.

And also used the heavy power lead that I ran from the fusebox to the boot to power an auxiliary power socket in the boot.

Useful for all sorts of things.

Thanks for this I wanted a aux socket in the boot and completely forgot about this power lead that was fitted to the relay

macafee2 · 1st June 2017, 12:35

I think if you don't have a split charging relay and have a caravan attached, it can flatten the car battery if left connected overnight without the engine running. The fridge may draw 12v from the car. This is only a guess on my part but once left he caravan connected to the car overnight and I had a flat battery

macafee2

30th May 2017, 17:41	#1
Abott10 * Join Date: Apr 2014 Posts: 227 Thanks: 1,275 Thanked 1,917 Times in 1,328 Posts	Tow bar Electrics Question is. Is TEB7AS bypass necessary? Have fitted Witter "Stowbar" kit to two of my ZTs. No electrics so far. Is it best to fit a Bypass module or simply Scotch Block to the boot's wiring loom? When removing a Tow Bar from a 75 in a local breaker yard, I also took the connected Bypass Module and all its wiring. Even the terminals on the module are labelled. So any answers and hints here will be greatly appreciated. Thanks in advance.

30th May 2017, 18:09	#2
Annie Avid contributor 2002 CDT Auto Con SE Saloon Join Date: Jan 2017 Location: Worthing Posts: 113 Thanks: 62 Thanked 15 Times in 14 Posts	the teb7as is needed. sets of bulb failure if not. I fitted mine along with the towbar a few weeks ago by myself in about an hour so really easy to do, just scotch lock into the wiring loom in the boot __________________ This vehicle was the 39,542nd 75 to run off the production line, out of 112,381 This vehicle was the 1,594th 75 CDT Connoisseur SE to be made out of 3,775 This vehicle was the 3,712th 75 in Wedgewood Blue Metallic (code: JEL) to be made out of 7,515 Wedgewood Blue Metallic 75s

30th May 2017, 18:17	#3
humphshumphs I really should get out more....... No longer a Rover Owner Join Date: Jan 2011 Location: As far east as you can go in the UK and not get wet feet. Posts: 2,273 Thanks: 404 Thanked 309 Times in 246 Posts	When I fitted my towbar, I used a bypass relay to stop the canbus having a fit. I cut, soldered and crimped all the wires so I don't have any issues that can happen with scotchlocks. __________________ Richard. No longer a 75 owner as my tourer made it to the moon, and died on it's way back. But 1/4 million miles ain't bad.

30th May 2017, 18:37	#4
MatP2 Avid contributor MG ZT-T, Mini Mayfair, VW Touareg Join Date: Mar 2015 Location: Chichester Posts: 172 Thanks: 48 Thanked 19 Times in 18 Posts	Definitely use the relay, definitely don't use scotchlocks. __________________ This vehicle was the 1,342nd ZT-T 190 + to be made out of 1,756 This vehicle was the 12th ZT-T in Chagall (Special Metallic) (code: IAT) to be made out of 21 Chagall (Special Metallic) ZT-Ts

30th May 2017, 20:44	#5
minimutly Posted a thing or two mg zt Join Date: Mar 2014 Location: cardigan Posts: 1,087 Thanks: 28 Thanked 187 Times in 158 Posts	I never used the relay - no issues..

30th May 2017, 22:53	#7
steve-45 This is my second home Rover 75 Saloon CDTi Join Date: Oct 2015 Location: Belvedere Posts: 4,076 Thanks: 108 Thanked 1,089 Times in 774 Posts	I installed the relay - just to be sure. And also used the heavy power lead that I ran from the fusebox to the boot to power an auxiliary power socket in the boot. Useful for all sorts of things.

1st June 2017, 12:35	#9
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,924 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	I think if you don't have a split charging relay and have a caravan attached, it can flatten the car battery if left connected overnight without the engine running. The fridge may draw 12v from the car. This is only a guess on my part but once left he caravan connected to the car overnight and I had a flat battery macafee2