Fuel pump derv Which Relay??

Stephen Palmer · 27th April 2012, 19:57

I have been having problems with the starting of my zt derv, sometimes the fuel pumps wont turn on and after turning the key on and off a number of times they come back to life. I think the fault is the fuel pump relay in the under glovebox fusebox, i have swopped the relays over and the pumps now fire up. I could do witha decent diagram of the fuses and relays as the haynes manual is useless. I could do with knowing what the relays in the under glovebox do?? As on leaveing out the faulty relay everything seems to work.
Am off to the scrapyard in the morning they have a v6 in i just hope that they have similar relays.
Thanks

T-Cut · 27th April 2012, 23:40

Is it a Mk1 or Mk2? The fuse boards are different. The later board uses mini fuses, the earlier one, 'standard' size fuses. I'll post a diagram once we know which system you have.

TC

kissifer1972 · 28th April 2012, 01:06

Sounds like the under bonnet pump has had it. They go intermittent before failing completely. Try turning the ignition on tapping the under bonnet pump, if it isn't running, and see if it then comes into life?

I doubt it is a relay.

Chris

mikesmith2 · 28th April 2012, 04:47

I had the same issue with my R75 diesel , that was the under bonnet fuel pump.

Stephen Palmer · 28th April 2012, 07:42

Mines a 2003 mk1, The pumps either both work or nothing, and it takes numerous turning on and off of the key and eventually they fire up again.
Thanks for the diagram i advance

27th April 2012, 19:57	#1
Stephen Palmer Regular poster MGZT-T Join Date: Mar 2011 Location: Maryport Posts: 63 Thanks: 1 Thanked 0 Times in 0 Posts	Fuel pump derv Which Relay?? I have been having problems with the starting of my zt derv, sometimes the fuel pumps wont turn on and after turning the key on and off a number of times they come back to life. I think the fault is the fuel pump relay in the under glovebox fusebox, i have swopped the relays over and the pumps now fire up. I could do witha decent diagram of the fuses and relays as the haynes manual is useless. I could do with knowing what the relays in the under glovebox do?? As on leaveing out the faulty relay everything seems to work. Am off to the scrapyard in the morning they have a v6 in i just hope that they have similar relays. Thanks

28th April 2012, 01:06	#3
kissifer1972 Posted a thing or two Rover 75 CDTi Conn Tourer & Rover 75 CDT Conn SE Saloon Join Date: May 2010 Location: Queensbury Posts: 1,368 Thanks: 0 Thanked 1 Time in 1 Post	Sounds like the under bonnet pump has had it. They go intermittent before failing completely. Try turning the ignition on tapping the under bonnet pump, if it isn't running, and see if it then comes into life? I doubt it is a relay. Chris __________________ Mods so far X-Power Performance Upgrade LED interior lights and sidelights Genuine Rover Xenons - now removed and sold Kenlowe fan Synergy 2 EGR Bypass

27th April 2012, 23:40	#2
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Is it a Mk1 or Mk2? The fuse boards are different. The later board uses mini fuses, the earlier one, 'standard' size fuses. I'll post a diagram once we know which system you have. TC

28th April 2012, 04:47	#4
mikesmith2 Loves to post None Join Date: Feb 2012 Location: Reading Posts: 466 Thanks: 1 Thanked 15 Times in 15 Posts	I had the same issue with my R75 diesel , that was the under bonnet fuel pump.

28th April 2012, 07:42	#5
Stephen Palmer Regular poster MGZT-T Join Date: Mar 2011 Location: Maryport Posts: 63 Thanks: 1 Thanked 0 Times in 0 Posts	Mines a 2003 mk1, The pumps either both work or nothing, and it takes numerous turning on and off of the key and eventually they fire up again. Thanks for the diagram i advance