Need help wiring a relay please..

**tbird2340** · 10-12-2012, 07:03 AM

Originally Posted by SNOtwistR

What type of vehicle we talking about, the under the hood panel looks like it would be hot since those are mostly engine related or major component related. Do you have another fuse box inside the vehicle. I have seen some fuse boxes be all live, It can be frustrating to get switched power that way. SNO

2008 Nissan Altima Sedan.. Yea, I have another fuse box in the cab but I don't really want to run a wire through the firewall for this if there is another way...

**tbird2340** · 10-12-2012, 07:13 PM

Ok, the one whole row is cold when engine is off and hot when on so I could use any one of these.. Which would be best?

15A Fuel Pump
10A Starter A/T
10A A/T Cont
10A Injector
10A ABS Cont
15A O2 Sens
10A Washer MTR

Probably should be a 10A since the add a fuse is rated at that..

And the relays I have are:

YONG LIN
YL-314-C-12VDC
NO:40A/14VDC
NC:30A/14VDC

Again, I'd like to do this the easiest way possible with the least amount of wiring.. If it's possible with one relay I'd much rather!

Thanks

**SNOtwistR** · 10-12-2012, 07:43 PM

The ONLY one I would touch is washer MTR all the other's are of importance to drivablity of the car SNO

**tbird2340** · 10-12-2012, 08:23 PM

Originally Posted by Freak4Dell

Couldn't you just use one relay, and not connect one of the pins?

Basically, connect 30 to the ignition, 87a to the LEDs, 85 to the headlights, 86 to ground, and then just not connect 87 to anything? When the coil is activated, it should flip to 87, but since the LEDs aren't connected, they should turn off. Am I missing something?

So is it safe to just do it like this?

**tbird2340** · 10-12-2012, 08:49 PM

I just hooked it up temporary like above and it worked but I thought of something..

When I turn on my high beams, the low beams go off so if I tapped into the low beams my LEDS would come back on when I had my brights on, no?

**OldSpark** · 10-12-2012, 09:05 PM

So much trouble for such a simple exercise....

Use diodes.

**tbird2340** · 10-12-2012, 10:46 PM

Done.. Thanks for the help!

I like how it came out.. Not sure if I can get ones that are brighter though..

**tbird2340** · 11-05-2012, 09:29 PM

I got another relay question.. I'm wiring my reverse light to my Lili. I probed the wire at the monitor.. When I hit the brakes it goes to 00.9V and it's 00.2V at rest.. When I go to reverse it goes to 12V as it should... It's just that even at 00.9V when the brake is pressed or when a turn signal is on it makes the monitor go into a fritz..

Can I use a relay so that I just get the 12V as needed and not have any of the other voltages on that wire?

Thanks

**tbird2340** · 11-05-2012, 10:11 PM

So would this work??

Hook 85 up to ground, 86 up to the wire that is 12V when reverse, 30 to the Liliiput green wire, and 87 to the 12V when reverse wire too?

So, 30 (the monitor) won't get any voltage at all until the car is in reverse, which is what I want..

I'm assuming it's OK to connect more than one relay pin (both pin 86 and pin 87) to the reverse wire?