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ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: westvilleguy on November 17, 2006, 12:52:52 PM

Title: what relay is this?
Post by: westvilleguy on November 17, 2006, 12:52:52 PM

i was having an electrical problem blowing a fuse everytime i tried to start my 91 tracker today i unpluged one of the 2 relays under the dash by the brake pedal it would not strat but stoped blowing the fuse so i'm guess this relay is gone it has the #'s 31850-80C10 on the 1st row E8T15171 on the 2nd and 1116 on the 3rd anyone know what it is ?

Title: Re: what relay is this?
Post by: Rhinoman on November 17, 2006, 01:04:48 PM

Could be one of the relays for the ECU. Fuel pump relay usually has a pink wire on it, main relay has a blue/black wire. If you're blowing a fuse its unlikely to be the relay but a short somewhere else in the circuit. The fuel pump wire is often troublesome, check the wiring behind the rear light cluster and the connection to the sender on the top of the tank.

Title: Re: what relay is this?
Post by: westvilleguy on November 17, 2006, 02:15:14 PM

looked through the wires for 2 days couldnt not find a short anywhere i believe its the fuel pump fuse its blowing but if it were a short y would it stop when i remove this relay sorry dont know much about wiring any spots i should look harder at for a short?

Title: Re: what relay is this?
Post by: Rhinoman on November 17, 2006, 03:06:23 PM

The wire goes through the relay, disconnect the relay and you've disconnected the circuit. Try working backwards, disconnect the wiring behind the light cluster and try it again, if it doesn't blow the fuse then the short is down at the tank.

Title: Re: what relay is this?
Post by: westvilleguy on November 17, 2006, 05:13:56 PM

i've disconnected the cluster with the lights and still blows

Title: Re: what relay is this?
Post by: Uncivilized on November 18, 2006, 04:50:23 AM

Also have a look at the harness connector behind the drivers side tail light, I've seen a couple go bad - and heard of more. Fuel pump wire, and all light wires are there. One could have broke off, and is touching metal inside.

Here was the one from my old 92...
(http://www.zuwharrie.com/gallery/albums/userpics/11825/DSCF0011_Small.jpg)

Title: Re: what relay is this?
Post by: Rhinoman on November 18, 2006, 11:39:49 AM

Are you sure that it is the fuel pump relay that you pulled?

Title: Re: what relay is this?
Post by: sapien on November 18, 2006, 11:46:17 AM

dying O2 sensor can be a source of blown fuses too, disconnect it by the firewall and see if the fuse still blows

Title: Re: what relay is this?
Post by: westvilleguy on November 18, 2006, 02:04:43 PM

i think i've got it narrowed down to a blue wire thats between the relay and the computer but cant seem to find any shorts in it but cant really follow it because there is to many wires

Title: Re: what relay is this?
Post by: zuksofhazzard on November 18, 2006, 06:31:14 PM

I had some trouble with one last summer.

It turned out to be a bad relay. One of the 2 that are attached to the ECM.

I called Trail Tough and Brent suggested that one was bad. He says over the years, moisture gets in and the contacts get a little dirty, rusty, whatever, causing them to stick. When they stick, they will cause a short. Blowing a fuse.

I replaced both for good measure. I was able to get them at a local GM Dealer. I have a friend and I was able to get them for $27 each. You might try there.

Also, this summer I had the same problem on another Tracker.

This one turned out to be the O2 sensor was bad. If I unplugged the O2, it would run, drive, start and everything, just fine. When it was plugged in, it would start idle a couple of seconds and pop the FI fuse.

That one turned out to be an easy fix. Install new O2 sensor.

One other thing to check is the grounds on the disty. They get weak over the years too.  ;)

These things will made a person real mad, real quick!  >:(

It will work out though, be patient.

Title: Re: what relay is this?
Post by: sapien on November 18, 2006, 09:23:18 PM

I may have a couple extra relays in my Trackers leftovers collection... will check tomorrow

Title: Re: what relay is this?
Post by: Rhinoman on November 19, 2006, 05:04:19 AM

Blue wire is most probably from the main relay. The ECU uses this to switch power to the main sensors and the ECU ancillaries such as the TPS and the vacuum solenoids, also the O2 sensor. I'm surprised that the relay sticking would cause a short but apparently so. You could try swapping the fuel pump relay into the main relay socket and seeing if it will then power up OK. Otherwise start disconnecting senors and stuff, starting with the O2 sensor as Zuksofhazard suggested. There is also a possibility that there could be a short inside the ECU.

Title: Re: what relay is this?
Post by: sapien on November 19, 2006, 06:51:35 AM

just to follow up on the O2 sensor thing, when it happened on my '93 I read somewhere that the heated circuit inside the sensor is what starts to draw too much current and blows the fuse, within a couple minutes or less of starting the engine.  I mistakenly put in a larger rated fuse and the O2 sensor wire caught on fire!

a replacement sensor is not too expensive these days