jcg928s

So I thought I had everything figured out with the battery Drain........

I removed this relay...



from this location.....



which was labeled "Fuel injection"

I replaced it with a working 5 pole relay and the car wont start.



The reason I removed the relay in the first place is because with everything off, the relay was very warm. (mind you the car hadnt been driven in two days). So I know that was the battery drain. Also, as soon as the relay is plugged in, it clicks as if it is energized.

Is there anything special about that relay? If not I will grab one from another spot and try it.


Thanks guys!

Landseer

Yes. The injection relay is very special in the sense that nothing else on the panel will interchange. But, it can be jumpered with a 3-way wire, 30 to 87 to 87. You can't leave the jumper in, obviously, when you turn the car off and walk away from it.

(Its the late 85-up panels where there are 10 or so interchangeable relays. Fewer are interchangeable on Ljet early cars, and none with the injection relay which has two 87 pins. Thats confusing if you are working through the archives and find folks advocating making relay swaps)


I'm not familiar with that particular arrangement, though, with a fuse on the front of it.

Must be pre-84, though 84 will work on the earlier Ljet cars.



Go to 928 specialists website and doublcheck its number ( if visible on yours for cross checking) with their listed one.

Last new one I bought cost about $65 or so.



Now, regarding it "clicking in". I think its the wrong relay. But you need to do some probing of this relay at the CE panel to be sure that the CE panel wiring isn't damaged.

Alan

Err - the diagram you posted is for the later panel - not yours.

I have never see one like that before...

I suspect that is a fuse tester relay - in that case you need to take the fuse out... Its not supposed to be left in there...

Alan

Landseer

Its a generic drawing that 928 Specialists uses to depict the early cars.

Has 38 fuse slots instead of 34, and shows them in blocks of 5 for the most part.
Doesn't properly show the bottom plugs, for which Y & Z are short and near the center.

They also still call-out a manual starter bridge and not a starter relay, which isn't the case. Manual and Auto both got starter relay after 80. Manual gets the bridge in the wiring, back in the trunk I think.

But has the relay layout labeled correctly.

White Lightnin'

Maybe that is why it feels warm and is draining the battery?

jcg928s

Hey guys,

Ok, I cross referenced the number from 928 specialists and it shows "Generic relay" on 928 internationals website as well.

928.615.119.00

So, what should I do then?

Where can I get this "fuel injection" relay from?

It shows as a generic relay, and its only $21.00, so should I order this one? from 928international?

http://www.mailordercentral.com/928i...928 615 119 00


Here is a pic of my fuse panel:



The red is the fuel injection relay

The green is where the "Kick Down bridge" is supposed to be, being the car is a 5 speed. Although nothing is there.

Alan

I know the heritage but this is just wrong... there is a real diagram of it in the WSMs... just Bad Bad Bad.

Alan

Landseer

Undesrstood Alan. Thanks, btw, for helping all of us.


Joey, can you show a picture of the relay you took out --- specifically the diagram on the side, and, the pin layout.

I've replaced these on 4 1984 LJet cars. 2 here, 2 at my local shop. They go bad.

Can't tell you why your's is drawing power, but I don't think its an OEM unit.
(*just saw the comments about the fuse testing function...)


The generic relays are the 24 and the slightly heavier duty 53. There are a few 24s on the early fuseboxes like yours and mine and they interchange. The 85+ 32V cars I think have 9 or 10 53 relays.

The 53 can be used on the early board in place of the 24s.

But the FI relay is different.

I'll go pull one also and take a picture for you.

jcg928s

Hey Chris,

The weird relay with the fuse is the one I took out of the fuel injection relay socket. (look at my first post). That one has been in there since I bought the car.

Oh yeah, let me take a pic of the back of it. just a sec

Landseer

84 Manual Panel, highlighting Fuel Injection relay, aka, AFM relay.

And an old FI relay for closeups.

The center pin is the "other" 87 pin.

jcg928s

Ok wait............

This is the relay that I tried, it just came out of something and worked just fine in the other vehicle.





Its the same kind as the correct Fuel injection relay.

Now think about this. Someone had mentioned that the one with the fuse was a test relay. It always made the relay stay energized.

I think the PO put this in there because there was an issue with the stock fuel injection relay not energizing with the ignition or something and this solved the problem for the time being.

When I put this standard 5 pole relay in there, the relay isnt being energized like it it supposed to and viola, car wont start. Hence when I put the "Test Relay" in there and it instantly energized when installed. the car will start.


So to summerize, I need a schematic of the wiring for that relay. This way I can trace down that wire that gets a 12v signal when the key is turned on. Once it is fixed, a standard 5 pole relay should work fine.

Landseer

We can check that, but what you need is the right relay. You have no idea the ratings of the relay in your hand, regardless of pin positions being same. The name of the game on these old cars is to never assume the previous owner / mechanic did the right thing. Clearly yours didn't.
The other car (your dad's?) --- same thing.


Key on, relay out, probe 85 for 12V ( other probe to ground).

Can also probe both 85 and 86 with voltmeter (key on), expecting 12V.


You should also have power when probing 30 to ground, even with key off.


The FI relays I have are weighty compared to normal relays. Order one.


You can also make up a three way wire --- insert it into 30 to 87 to 87... then car will start.

Mrmerlin

Joey the 5 pin relay that you swapped out isnt the same as the one Chris posted.
IOW both the 87 pins dont get energized with the 5 pin you have ..
SO you need the correct relay to start off with.

jcg928s

and thats why you guys are called Gurus and I am simply the grasshopper.


Im going to order the correct one from 928intl when they open today.

I will post as soon as it comes in.

Thanks again guys!