Ignition Wiring 12V

damunk · Post by **damunk** » Sun Sep 29, 2013 8:18 am

I have the 2 cables under the steering wheel.
Permanent and Ignition wire.

Is it okay if I tap into the ignition with:
1)Fuel Pump
2)Megajolt & Edis

Will it draw too much power?
I read earlier that if you draw too much power from these cables on a same circuit that it can blow the fuse but I need both the above with ignition and not from battery.

Lazeum · Post by **Lazeum** » Mon Sep 30, 2013 11:10 pm

Put some relays.
This is what I've done: I get power from battery but I've put a relay for each system which is controlled with ignition wire.
That's the way to do it. Add also some new fuses to your new harness.

damunk · Post by **damunk** » Fri Oct 04, 2013 8:59 pm

Lazeum wrote:Put some relays.
This is what I've done: I get power from battery but I've put a relay for each system which is controlled with ignition wire.
That's the way to do it. Add also some new fuses to your new harness.

Can't I just cut into wire nice and neat using a terminal box like the below?

My megajolt and edis have inline fuse.

Also is it better to go into the fusebox and use a slot where it is empty using the below adaptor.

tightwad · Post by **tightwad** » Tue Oct 08, 2013 10:16 pm

I like that terminal buss adapter....where did you find it?

damunk · Post by **damunk** » Wed Oct 09, 2013 10:06 pm

tightwad wrote:I like that terminal buss adapter....where did you find it?

it's on ebay

damunk · Post by **damunk** » Sun Oct 13, 2013 7:32 pm

The above adaptor lead works, getting power straight from the fuse box.

A question please.

I have connected megajolt to a power supply from the fuse box that engages on ignition when you turn the key to get the computer lights on. The megajolt green light comes on.

BUT.

When you turn the engine the megajolt green light flashes off and then back on for 3 tenths of a second.
Is this okay?

p.s I'm only doing the wiring at present. No coil packs connected yet.

Thanks.

tightwad · Post by **tightwad** » Mon Oct 14, 2013 2:09 am

damunk wrote:The above adaptor lead works, getting power straight from the fuse box.

A question please.

I have connected megajolt to a power supply from the fuse box that engages on ignition when you turn the key to get the computer lights on. The megajolt green light comes on.

BUT.

When you turn the engine the megajolt green light flashes off and then back on for 3 tenths of a second.
Is this okay?

p.s I'm only doing the wiring at present. No coil packs connected yet.

Thanks.

It sounds like your fuse box connection loses the power while the engine is cranking. This would disable the MegaJolt I think.

damunk · Post by **damunk** » Tue Oct 15, 2013 5:22 pm

I have done a test 'tightwad'.

Not all of the fuse box loses power for that split second of cranking.

FUSES A) Only certain fuses that connect to the immobilizer go off and on. I HAVE NOT TRIED THE ECU FUSES
FUSES B) The permanent ones like lights, cigarette lighter, reg plate light stay on through the fuse box. With key "on" or off". They stay on from battery power.

Can someone help me in electrical terms about "relays"

Is it possible to have some sort of relay from FUSES A to FUSES B.?

Also shall I try the ECU fuse connections? I mean surely if they did not have 12v on cranking then the car would not work with its original ECU.

bmcdaniel · Post by **bmcdaniel** » Sat Oct 19, 2013 2:22 am

Where is the wire from the ignition switch that powered your original ignition? That's what I use to energize a relay and supply battery power to the EDIS/Megajolt.