240 relay prob

morwenna240 · Sep 24th, 2020, 13:35

Hi. I have an 1989 240, 2litre estate. No start. Fuel pump works, relay seems to, that is, if u hold it an turn key you can feel it click, an click again when turn off. If, as says in Haynes, i jump fuse 4 and 6, engine starts straight up. I bought a new fuel pump relay, no change. Can't see any wiring faults, an as car runs with fuse jump, main wires to pump, ignition switch, etc, must be ok. Any pointers, people?

Clifford Pope · Sep 24th, 2020, 16:16

There are two kinds of fuel pump relay - white and green. I'm not sure what the difference is, nor whether they are even interchangeable in fitting. You do presumably have the correct one?

Bugjam1999 · Sep 24th, 2020, 16:32

The fuel pump relays are not interchangeable - green for a k-jet car, white for a 2.4lh car.

Cheers

morwenna240 · Sep 28th, 2020, 18:24

Well, it had green one when i got it. In glove box was another green one, date stamped july '87. The one fitted was stamped 2007, so i assumed green correct. certainly it ran fine with it, until recently. Car had stood for ten yrs, so i renewed underneath completely, brakes, suspension, exhaust, wheels.

Clifford Pope · Sep 29th, 2020, 08:13

Jumping fuses 4 and 6 bypasses the rely and lets the pumps run continuously.
If the engine then starts and runs properly then it surely can only be the relay faulty, or perhaps the socket it plugs into, or the connections at the fuse board?

morwenna240 · Sep 29th, 2020, 21:02

Ummm, that's what i thought, but couldn't find anything. But. . . i noticed that fuse 6 had got hot, to the extent of melting the foreward end of fuse enough to sink in the actual metal strip. Does that imply resistance? What could cause that?

Sep 24th, 2020, 13:35	#1
morwenna240 Senior Member Last Online: Today 17:23 Join Date: Sep 2019 Location: heptonstall	240 relay prob Hi. I have an 1989 240, 2litre estate. No start. Fuel pump works, relay seems to, that is, if u hold it an turn key you can feel it click, an click again when turn off. If, as says in Haynes, i jump fuse 4 and 6, engine starts straight up. I bought a new fuel pump relay, no change. Can't see any wiring faults, an as car runs with fuse jump, main wires to pump, ignition switch, etc, must be ok. Any pointers, people?

Sep 24th, 2020, 16:16	#2
Clifford Pope Not an expert but ... Last Online: Apr 26th, 2024 12:45 Join Date: Dec 2001 Location: Boncath	There are two kinds of fuel pump relay - white and green. I'm not sure what the difference is, nor whether they are even interchangeable in fitting. You do presumably have the correct one?

Sep 24th, 2020, 16:32	#3
Bugjam1999 Master Member Last Online: Today 16:21 Join Date: Nov 2012 Location: London and Cambridge	The fuel pump relays are not interchangeable - green for a k-jet car, white for a 2.4lh car. Cheers

Sep 28th, 2020, 18:24	#4
morwenna240 Senior Member Last Online: Today 17:23 Join Date: Sep 2019 Location: heptonstall	Well, it had green one when i got it. In glove box was another green one, date stamped july '87. The one fitted was stamped 2007, so i assumed green correct. certainly it ran fine with it, until recently. Car had stood for ten yrs, so i renewed underneath completely, brakes, suspension, exhaust, wheels.

Sep 29th, 2020, 08:13	#5
Clifford Pope Not an expert but ... Last Online: Apr 26th, 2024 12:45 Join Date: Dec 2001 Location: Boncath	Jumping fuses 4 and 6 bypasses the rely and lets the pumps run continuously. If the engine then starts and runs properly then it surely can only be the relay faulty, or perhaps the socket it plugs into, or the connections at the fuse board?

Sep 29th, 2020, 21:02	#6
morwenna240 Senior Member Last Online: Today 17:23 Join Date: Sep 2019 Location: heptonstall	Ummm, that's what i thought, but couldn't find anything. But. . . i noticed that fuse 6 had got hot, to the extent of melting the foreward end of fuse enough to sink in the actual metal strip. Does that imply resistance? What could cause that?

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