Ignition Power Sourcing
08-17-2014, 07:00 PM
#1
Nordschleife Master
Thread Starter
Ignition Power Sourcing
Guys,
Kind of a sophomoric question.
If you had to use ignition power to energize a relay from the CE panel, what would you use ?
Thanks in Advance.
Craig
Kind of a sophomoric question.
If you had to use ignition power to energize a relay from the CE panel, what would you use ?
Thanks in Advance.
Craig
08-18-2014, 12:07 PM
#4
Electron Wrangler
Lifetime Rennlist
Member
Lifetime Rennlist
Member
This is for Craig's fan controller additional sensor switching...
Use an Add-A-Fuse in place of a CE fuse with an X-bus supply.
The fuse socket closest to the blades accepts the original fuse - the other is the new fuse - the inputs pair together across both fuses while the new fuse feeds the pigtail wire.
On an '87 these are fuses 1-5 (varies by year). The fuse input bus supplies are at the top (on '85-'95) so orient the Add-a-fuse device with the paired contacts at the top and the feed wire at the bottom, use a 1A or 3A fuse for this. I'd use fuse #3 - for the Fan control unit (sort of makes sense right?). In this case if you were adding the relay at the site of the old fan control unit you could just connect there instead and simply rely on the existing 5A fuse (quite adequate) - connect to the black wire on Pin 4 of the fan control unit.
X-bus is on with accessories and ignition but off during starting - this is why it is used for high current devices to reduce current while the starter motor is operating, this is the ideal switched source for this use.
An add-a-fuse is a good way to do power feeds in general ('85 & later models, use ATO/ATC types) - totally reversible and well engineered. Fits in available space on your CE panel and is quite secure. Select fuses with the correct type of supply (permanent, ignition, accessory) for the usage and ideally select fuses that are light loading 5A/7.5A. Document what the additions are for - and if you have more than one distinguish between them (wire colors?). Do not uses this method for high current supplies though - good for <5A accessories. Some locations can support more power (say up to 10A) - but not all depending on the fuse source wiring.
Alan
Use an Add-A-Fuse in place of a CE fuse with an X-bus supply.
The fuse socket closest to the blades accepts the original fuse - the other is the new fuse - the inputs pair together across both fuses while the new fuse feeds the pigtail wire.
On an '87 these are fuses 1-5 (varies by year). The fuse input bus supplies are at the top (on '85-'95) so orient the Add-a-fuse device with the paired contacts at the top and the feed wire at the bottom, use a 1A or 3A fuse for this. I'd use fuse #3 - for the Fan control unit (sort of makes sense right?). In this case if you were adding the relay at the site of the old fan control unit you could just connect there instead and simply rely on the existing 5A fuse (quite adequate) - connect to the black wire on Pin 4 of the fan control unit.
X-bus is on with accessories and ignition but off during starting - this is why it is used for high current devices to reduce current while the starter motor is operating, this is the ideal switched source for this use.
An add-a-fuse is a good way to do power feeds in general ('85 & later models, use ATO/ATC types) - totally reversible and well engineered. Fits in available space on your CE panel and is quite secure. Select fuses with the correct type of supply (permanent, ignition, accessory) for the usage and ideally select fuses that are light loading 5A/7.5A. Document what the additions are for - and if you have more than one distinguish between them (wire colors?). Do not uses this method for high current supplies though - good for <5A accessories. Some locations can support more power (say up to 10A) - but not all depending on the fuse source wiring.
Alan
08-18-2014, 01:41 PM
#5
Nordschleife Master
Thread Starter
Really, thank you very much for this and your PM input being patient with my questions.
Once the add-a-fuse connector is obtained, the job will be near done and posted.
Once the add-a-fuse connector is obtained, the job will be near done and posted.