40 amp extra load - Power from where? (E39) - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 10-22-2010, 03:15 PM
RIL
n00b
 
Join Date: Oct 2010
Location: Sweden
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
RIL is on a distinguished road
(Thread Starter)
40 amp extra load - Power from where? (E39)

I'm about to add an extra electric device consuming some 40 A battery power continously. I'm placing the device in the front under the hood. The device will be relayed to ON on starting the engine. For this I have two questions:

1. Is there an existing preferred cable already in place which I could attach to (powering the 40 A relayed device), or will I have to add an extra 6 mm cable all the way from the battery in the back of the car to the front?

2. In order to control the 40A relay for the above device, it suffice if the extra device kicks in AFTER the engine is running fine (that is, avoiding extra load while the starter is working hard). Where from should I best pick up the 12V signal to the above 40A relay?

I'm not an expert on BMW so I would need helpt to locate any existing connection points.

I opened the Control Unit Box under the hood (to the right, near the front window) and I can there see a fairly "fat" realyed red cable, but I have no instructions /wire diagram available as to determine it's usage.

Regards from Sweden,

// RIL
RIL is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 10-23-2010, 07:55 PM
Neutral Member
 
BBenedict's Avatar
 
Join Date: Jun 2008
Location: Walnut Creek, CA
Posts: 67
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BBenedict is on a distinguished road
There is an auxiliary positive terminal in the engine compartment of my 2002
540 for "jump" starting the engine. You could get your power there.

I don't have an answer for your second question.
BBenedict is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Newbi needs help with harman kardon e46 stereo want to put and extra amp and sub bainsforlife Audio and Electronics 4 04-12-2010 12:28 AM
Misfire & no power fester001 5-Series (E12,E28, E34, E39, E60) 9 06-10-2009 08:46 PM
Quick query E39 /E61 Load (roller) Cover Banstead 5-Series (E12,E28, E34, E39, E60) 7 06-07-2009 01:53 PM
amp power wiring? pippy0 Audio and Electronics 3 07-06-2006 09:48 AM
Hk Power Amp Needed For My 1998 Z3 ZZZ3 Classifieds Sell & Buy 0 01-31-2005 11:31 AM

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome