help identifying this part

[chupacabra99]

can anyone tell me what this part is? It looks burned. It is on the firewall. This is an 87 Buick Riviera with 92,000 miles. One owner.

[chupacabra99]

can anyone tell me what this part is? It looks burned. It is on the firewall. This is a 87 Buick Riviera.

[maxwedge]

Nothing to look at?

[chupacabra99]

I am having a hard time with pictures.

[danielsatur]

Probably something electrical and drawing alot of current.

[autojoe]

looks like a relay......fuel pump relay? ac relay? cooling fan relay?does car start........any burned out fuses?

[chupacabra99]

The car runs pretty good. I get a message on my CCC that says my Engine Control Module needs servicing. It stalls sometimes. When I try to pull codes with a paper clip, the service engine light just starts flashing real bad. I have this posted on 3 forums and no one knows what it is!!!! I find that strange. I would think someone knows what it is. Maybe not enough people are reading this post.

[autojoe]

the field service mode has 2 forms......key on engine off and jumpering terminals a and b of the 12 pin alcl connector and using flash diagnostics count the flashes.....also if car is running the ecm will display oxygen sensor status through the check engine light....if light is flashing very fast about two times per second indicating the ecm is in open loop and after enters closed loop the light will stay on during rich condition and off means lean condition......you want to check codes koeo key on engine off and count flashes in numeric sequence.

[chupacabra99]

I turn the key on, insert the paper clip to short the terminals, and then the light just starts flashing about once a second and never stops. It gives no read outs or anything. I can go to the CCC and go to Climate control, push off and warm at the same time, and enter the service mode, and pull up some codes. But as far as pulling up the codes off of the flashing light, I can't. I am not even sure the Riviera will let you do that.

[autojoe]

get a subscription to alladatdiy.com and find out what relay that is and also look at wiring schematics for that relay.......it should be fuse or fusible link protected.know anyone with a scan tool to see if communication is possible with cars ecm?

[chupacabra99]

Here are a couple more pictures.

[chupacabra99]

This is another one. I have alldatadiy.com and I can't find a schematic for what this is. Alldatadiy.com is hard to navigate. Lots of jumping around, back and forth, etc.

[chupacabra99]

here is a schematic from alldatadiy.com

[chupacabra99]

It is a connector. The two parts push together and held that way with a screw. It runs back inside the car.. It looks like it got hot and parts of the asphalt or what ever it is inside of them, melted! The prongs look like they have it all over it too. I am at a loss now. It is not like a part that can be replaced. If I clean it up good, I still have not solved what got it so hot. No fuses anywhere are blown. Any ideas?

**************************************UPDATE.

I did some more research and it seems that black asphalt is actually black di -electric goop from the factory! So I am putting it back together, unless someone can tell me why i shouldn't.

[autojoe]

engine dash harness connector........do wires go to fuse block or to ip inside car?