M.J.L.

Car wont start. New relay installed, fuel pump ect. I did a electrical test with a voltometer. The power is not getting to the relay. Everything is hooked up as I can see. I checked and the Oil PSI is hooked up now. It was not hooked up before. Wiggled loose. Sstill no start though. Please help. I hooked the fuel pump up to the battery directly and it worked great. Where is the power getting stopped from the relay to the pump??? If I can not fix it by tonight, I have to pay a large towing bill to have it towed to the mechanics. AAA WONT tow it to my mechanics since the car is in my driveway.

3D-Aircrew

What kind of work were you doing on it?

M.J.L.

I was trying to replace a fault relay but it blew it out twice so now Im just trying to get the damn thing to run!.

3D-Aircrew

I'm guessing your Fuel Pump relay is the one your talking about. There are two failure modes the relay solenoid burned out or the contacts went bad somehow. Irregardless the oil pressure switch should provide power to your fuel pump if your getting 4 PSI.

Try cranking longer to make sure you have oil pressure. It should start.

The toasted relays is another issue. If you had currents high enough to fry a relay you may have burnt a fusable link. It's possible the pump is drawing too much current too.

M.J.L.

Just realized theres ANOTHER relay behind the battery and it is COOKED! Literally melted internally and externally.

Oh yes, the Corvette is a 1986. Thanks. Will dig deeper.

MikeC4

CF member rharker brings up a good point. Check your fusible links as well. As far as location goes, on my '94, the fusible links are behind the battery, on the firewall side. The fusible links attach to a standard fuse box.
You have a high current draw condition somewhere, and this needs to be isolated and corrected.

MK 82

As I told you in your other thread, get a schematic and trace it out. A mechanic is inevitable for some.

rodj

The feed to the oil pressure switch is through the same fusible link that supplies the relay.
If he is blowing things up more than likely he has taken the link out.

Possibly grounded out while loose blowing the fusible link

Happydad

On A 86 you can jump the ADL under the dash to run the pump A&F(I Think)...If you don't hear the pump humming..Check the relays and links

Muffin

F should provide a direct circuit to the fuel pump.

AGENT 86

It's terminal "G" on the ALDL

Have you tested the fuel pump fuse, in main panel ??

AGENT 86

http://members.shaw.ca/dankai/Fuel%2...elivery-8A.pdf

http://members.shaw.ca/corvette86/Co...0View%2086.pdf

http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf

http://members.shaw.ca/agent86/Power%20Distribution.pdf

MK 82

Some folks need it spoon fed to them. The OP has been given everything necessary to fix this. It is a simple circuit.

3D-Aircrew

The other toasted relays look like the MAF burn off and the MAF power control relay which get their power from the same fusible link H.

M.J.L.

I have printed out every diagram and response you guys have given me and going thru them. It's takeing me awhile to go thru it all so I wont miss anything. The fuse in the main fuse panel box was one of the first things I checked. It's good. I am heading out to retrace it all. I did check the grounds and they are all fine from what I can tell but I am going back over them again. Thanks guys. Will get back to you when I find it out. All the information you guys have provided are going in a folder for future references in case I run into a problem and I could always pass it on to someone else in need of it.

M.J.L.

I replaced both relays now, had the battery checked, and rechecked everything. Ok, so what I have come to is I am not getting power to the fuse box. So somewhere between the battery and the fusebox, something is stopping the power. I have been tracking everywhere, took out the fuel pump again, checked all those wires, tightened everything down, still trying to pin down where that short is. Between the battery and fusebox,...hmmm...a short...All new relays, batterys good, wires/grounds appear to be good...Definatley a challenge. Going back over the diagrams again to see if I missed anything.

M.J.L.

Wait, the fusable link. Where is that located exactly? Is that where the ADL is or??? Thats the only thing I have left but I might have missed it on the car. Where is it exactly and what does it look like? Is there a picture in the diagrams you guys showed that I am missing? Thanks.

M.J.L.

Nevermind. I missed it on agents list. Thanks. So it's link G Correct?

MK 82

You are in over your head man. No power to the fuse box is not a short. It is an open. I am sure you have fried the fusible link. Relays do not "blow."

Benny42

I agree. It has to be fuse link H. The top link from Agent86
shows it top left. benny