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cornishboy1990

New Member
Hi there! Had my '75 series 3 for about 2 years now, I am a complete novice when it comes to engines/electrics but things are now starting to go wrong and i'm having to learn :)

Just a quick question, does anyone know what this black Lucas box is attached to the bulkhead? When I turn on the heater plugs it begins to smoke followed by a smell of burning just wondering what's occurring.

Any help greatly appreciated!
 

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If memory serves correctly,it's a ballast resistor but I'm sure someone on here will jump down my throat if I'm wrong:D:D
 
Probably a relay for the glow plugs ....
either it's knackered OR too small to handle the current the glow plugs pull OR a fault with the wiring to it OR fault with the glow plugs
 
There is a wire going to the black button that operates the plugs and one going to the ballast then another to the battery, dunno if its to small to handle the current as it's been fine for 2 years
 
cornishboy1990 said:
There is a wire going to the black button that operates the plugs and one going to the ballast then another to the battery, dunno if its to small to handle the current as it's been fine for 2 years
Click to expand...

Gotta be a relay then,It could be bad connections but replace it anyway for what they cost.
 
To within reason a relay is a relay.Their job is to act as a secondary beefed up switch so as not to burn out the operating cab switch so i would say give it a go and see what happens but have someone looking under the bonnet to keep an eye on it when activated.
One things for sure,the old one's a potential fire if left unsorted:eek:
 
the bracket next to the relay should have a large spring on the back of it if not you need a new one of them

now the big red wire on that bracket should be on the other end of that bracket then the thick brown wire with a yellow stripe should be on the left terminal of the bracket thing along with the thin brown wire and the green wire with the white stripe goes to the bulkhead

as per original to the vehicle wiring the relay doesnt need to be there

hang on ill get a pic of mine
 
cornishboy1990 said:
So if it's wired up to the bracket correctly i don't need the relay?
Click to expand...

as long as the spring thing is ok on the back of the balance resistor bracket and not shorting directly to earth normally the 2 bolts through either end of the spring are insulated with 2 bakerlite washers or similar :D:D:D;);)
 
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