7FAQ

How Do I/Wire a Start Button

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The Following Applies to:

ALL ROVER K SERIES VARIANTS, 2001 ONWARDS (EU2 AND EU3)

The reason for this statement is that the wiring diagrams for the Start Button below match the wiring diagram for the above vehicles. The wiring diagrams below have been used and are known to work.

HARDWARE

The Big Red Start Button I used is from Farnell> http://www.farnell.com
  Type Number: 109282
  Description: 76-9410/439088R SWITCH, FLUSH RED
There are FOUR Male blade terminals on the rear of the switch. The OUTER TWO are the ones to use. The wires may be soldered to the switch or 2.8mm Female blade Pre-insulated terminals can be crimped to the cable ends instead.

To fit the wires to the back of the Farnel Start Button I used:-

Femail blade 2.8mm, Blue @ £1 for 10, Ref. No. BF2. - doesn't hurt to have a few spare (Available from Vehicle Wiring Products - details below). I've not seen this size in my local Motor Factors or Halfords.

The Blue Pre-insulated terminals will take up to two pieces of Thinwall 25A twisted together; if you ever needed to do that. One piece is a nice fit. However the Thinwall 25A will NOT fit in the Red Pre-insulated terminals.

The 2.8mm Femail blade fits the width of the switch terminal nicely, but you have to give the "bent over" bits on either side a tiny squeeze with a pair of pliers to give a good tight sliding fit. NOT TOO MUCH though, or you might buckle the Male blade terminal on the switch when you slide it on.

You will need some 6.3mm ("Normal" size) Blue, Male blade Pre-insulated terminals to fit the wires into the connecters you may remove from the standard key switch and 6.3mm Blue, Female blade terminals to fit the wire onto the "unused" terminal on the back of the standard key switch, if applicable - sorry if I'm telling you the obvious.

I use a "Professional" crimping tool (That's its name). It has a ratchet that will not release until you've crimped the terminal enough. They're about £18, but the cheap-o ones are a waste of money IMHO - you don't know if you've squeezed the terminal enough and they distort very easily.

My advice is to give the joint a good hard tug when you've finished the crimp - just to make sure you have a good crimp - occasionally not.

THINWALL CABLE

A high performance cable which, as the name suggests, has thinner insulation. It is multi-strand copper cable which is insulated with thinner high performance hard grade PVC, which offers good resistance to abrasion and cut through. The cable also carries a higher load compared to standard auto cable. Gives savings in weight and volume when used in large harnesses. The cable is now original equipment in most new vehicles.

Suitable Thinwall cable is available in any colour or colour combination you desire from, among other places:Vehicle Wiring Products Tel: 0115 9305454, Fax: 0115 9440101, e-mail: sales@vehicleproducts.co.uk

The 28/0.30mm, 2 square mm , 25amps specified is slightly "Overkill", but is safe and easy to use. The reference number is 25 and is 30p per metre; just tell them which colour you require.

Cable of a lesser specification CAN be used for the Start Button, as the Button itself is only rated at 10amps, BUT the Ignition Switch wire (WHITE) on the car is cable of greater current carrying capacity and the 25amp Thinwall cable is suitable both for the Start Button and the Ignition Switch - better to err on the side of caution IMHO

Note: I have no connection with Vehicle Wiring Products, but have received very good service and helpful advice from them in the past.

WIRING DIAGRAMS

This illustration shows the wiring changes necessary to wire a Start Button, retaining the standard key switch for ignition and to ARM the Start Button

(The dashed lines show the connectors to be removed from the standard key switch)

Rest your cursor on the picture to enable selection of the PRINT icon.

This illustration shows the wiring changes necessary to wire a Start Button with a separate toggle switch for ignition - plus an optional arming switch for the Start Button

(The dashed lines show the connectors to be removed from the standard key switch)

Rest your cursor on the picture to enable selection of the PRINT icon.
Tony Cummings

 FilenameSize   ModifiedByComment 
BigRedkey.gif (v1)  8 KB   Dec 24, 2008 17:58  81.27.106.xxx   
BigRedkeyless.gif (v1)  17 KB   Dec 24, 2008 17:58  81.27.106.xxx   

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