The idea of a "voltage sensitive relay" (VSR) or "voltage controlled relay" (VCR) as they are sometimes known, is to simplify the installation, no connection is made to the vehicles alternator .
Switch on voltage 13.30vdc
Switch off voltage 12.80vdc
Dimensions:-65 x 65 x 53mm
Relay connections:- 2 x 6mm studs for power in and out. 1 x 450mm cable for negative

ALT/TF140-1EA-13
Rubber gasket for 7 or 13 pin electrical towing socket
Please see also ALT/TP102 Click here for ALT/TP102
ALT/TP740-1-01
7 Pin 12 volt towing plug
12N
Metal bodied
Brass screw terminals
ALT/TP750-1-01
7 Pin 12 volt towing socket 12N
Converts a 13 pin towing socket to accept a 7 Pin 12N Electrical towing socket
No wiring required, simply plug in and play
BULK / TRADE PACKS AVAILABLE
100Amp 24 volt split charge relay
VOLTAGE SENSING
Very simple to install
3 Connections to make
Power in, Power out & negative...that's it!
TO CLEAR LIMITED STOCK WAS £59.99 NOW £35.00