Haynes Forums  

Go Back   Haynes Forums > Haynes Roadster Forums > Electrics
FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #1  
Old 22nd March 2010, 10:41 PM
deezee's Avatar
deezee deezee is offline
Senior Member
 
Join Date: Jan 2009
Location: Wirral
Posts: 744
Default Sierra Relays

Right, I've been having trouble with my relays. I thought I understood the Sierra fusebox. However one relay "Engine Management" which I was using for my megajolt and fuel pump works in reverse! It cuts power when the ignition is turned to start?

Why is there a relay that cuts power when the engine is cranking? What was then originally connected too? I've double checked the wiring diagram in the Haynes manual and the only relay shown like that is the dim/dip.... which it defiantly is not.

Can I just replace this relay, or is something SUPPOSED to have its power cut when cranking?
Reply With Quote
  #2  
Old 22nd March 2010, 10:47 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,389
Default

What year, what engine, what relay.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost £4181.65 - Last - Wheel Cylinders
Reply With Quote
  #3  
Old 22nd March 2010, 10:54 PM
deezee's Avatar
deezee deezee is offline
Senior Member
 
Join Date: Jan 2009
Location: Wirral
Posts: 744
Default

Fusebox is off a 1992 1.8CVH. Relay is called Engine Management in the Haynes Manual. It had a fuel pump feed coming off it, but the car never had a fuel pump fitted.
Reply With Quote
  #4  
Old 22nd March 2010, 11:00 PM
deezee's Avatar
deezee deezee is offline
Senior Member
 
Join Date: Jan 2009
Location: Wirral
Posts: 744
Default

Alternatively does anyone have a Sierra fusebox they don't need?
Reply With Quote
  #5  
Old 22nd March 2010, 11:04 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,389
Default

whats its position according to the fusebox lid, forget haynes it's usless for wiring.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost £4181.65 - Last - Wheel Cylinders
Reply With Quote
  #6  
Old 23rd March 2010, 02:57 PM
deezee's Avatar
deezee deezee is offline
Senior Member
 
Join Date: Jan 2009
Location: Wirral
Posts: 744
Default

I've collared a photo off Google and highlighted the relay thats called Engine Management. Like I said in my first post, the Haynes wiring diagram clearly shows it operates the fuel pump when the ignition is on, but its live all the time and cuts power when the engine is cranking?

Reply With Quote
  #7  
Old 23rd March 2010, 06:51 PM
twinturbo's Avatar
twinturbo twinturbo is offline
Super Moderator
 
Join Date: Jul 2008
Location: Carlisle
Posts: 4,389
Default

Relay D - Engine Management

Supplys power to the choke bimetalic strip.

Controled from pin 25 on the ESC-Hybrid.

TT
__________________
You only get a woosh with a dump valve

Build Thread


Man Cave Mantiques



Cecil Street Auto Repairs Garage Carlisle




Build Cost £4181.65 - Last - Wheel Cylinders
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT +1. The time now is 11:37 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.