Guest weeble Posted April 9, 2008 Share Posted April 9, 2008 Help please, Does anybody know what the supply voltage to the ignition coil on a 1987 Range Rover is supposed to be?. Some data books say its supposed to be 11 volts with a ballast resistor and others say battery voltage. The distributor is a type with a 9em module fitted to the side. Quote Link to comment Share on other sites More sharing options...
SteveRK Posted April 9, 2008 Share Posted April 9, 2008 Just had a look at manual (Haynes) and it seems that up to 1986 a ballast resistor was fitted so the coil would be 6V or 9V typically. 1986 onwards does not show a ballast resistor but does show a 'constant energy unit' whatever that is so it it could be 6,9 or 12 volt coil.??? 1989 onwards looks like it will be a 12 volt coil no ballast resistor. Beware that the fuel injected engines will have a resistor on the '-' coil terminal that feeds the ECU typically 7K Ohms (its a small part about 10mmx10mmx3mm) fitted approx' 6" up the loom from the coil, not to be confused with a ballast resistor that would connect to the '+' coil terminal. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted April 9, 2008 Share Posted April 9, 2008 The coil is fed +12v ignition switched and the amplifier / "constant energy unit" grounds the -ve side to make sparks. My '86 EFI didn't have a ballast resistor and had the older wing-mounted amp unit. Quote Link to comment Share on other sites More sharing options...
tel Posted April 13, 2008 Share Posted April 13, 2008 hi guys im having a problem with mine too mine's a 1986 efi and ive got the older style wing mounted ignition amplifier that you talking about are these a common failure as mines got new coil new cap leads and rotor arm and still wont start its driving me mad Quote Link to comment Share on other sites More sharing options...
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