Complete power failure ! 89 Supra

[JWold]

I was test driving my car a few days ago after having the transmission oil changed. As I picked up speed into 3rd gear I heard a pop from under the hood. I knew that can never be good so I started to turn around in a neighborhood. I was able to do a full 3 point turn then she died, all power cut out not even the lights that would normally fold down without even the key being in would fold. I replaced the am1 and 2 fuses as well as the main relay, and checked the link fuse that is good.
Only one time so far have I been able to get in and turn the ignition switch on the dash lights lit up and she beeped at me, but as soon as I try to crank her it all cuts out again. :aigo:

 

[rodama5anthony]

mmmm are u hella slammed? u check your battery? check your alternator? have u located to source of the pop noise?

 

[MightyAl]

Check all your connections. I have had this problem with a loose battery connection. Lights would come on but as soon as you try to start it doesn't do anything. Check grounds, battery, and alternator connections. I would bet dollars to donuts something came loose.

 

[IBoughtASupra]

Have you done a battery relocation? Explain how you have your power wires connected if you have done a relocation.

 

[JWold]

Well it is stock everything except the fuel pump. I just had the battery checked and it is fine. I just tried it and everything came on then I tried to turn it over and got 4 or 5 quick clicks then all went dark again.

 

[rodama5anthony]

sounds like a grounding problem to me

 

[D.J.T.]

Check your Battery ground terminal connector.
This happened to me. The Supra wouldn't start. The terminal connector looked completely normal from above..
But when i took it off the underside of the terminal connector where two bolts go was melted bad? WTF.. It's happened twice when i didn't have the Battery tied down.
Ordered one from Driftmotion & now it hasn't happened again.

Also check the connection to the fuse box. Once it broke & i was on my way to work on the free way... put it on neutral in the circular exit it died... & that's when i truly appreciated the E-Brake & Power steering.
With no power the brake pedal became extremely tough & BARELY worked..

 

[JWold]

Where are all the fusible links at? I found the one in the fuse box under the hood. Arent there more of them?

 

[D.J.T.]

Where are all the fusible links at? I found the one in the fuse box under the hood. Arent there more of them?

Kick panels.

http://www.cygnusx1.net/Supra/Library/EPC/291420/catalog.aspx?F=8401&P=3

 

[ForcedTorque]

I have this happen all the time with my car that doesn't drive. I have a parasitic drain, so I always disconnect the negative when not running the car. If I go out to work on the car, I hook it back up, but don't tighten it down properly. It will make a good enough connection to power everything. But, if I turn the key it kills everything. I jump out, and turn the fairly tight connector til I hear the bells and whistles, and try again. Same thing happens. It's irritating when I don't really want to drive the car, and don't want to go fetch my allen wrenches and my 14. I need to put stock cables back on.

 

[IBoughtASupra]

Do you have a ground from the negative terminal to the chassis and engine block? Make sure they are tight and not rusted.