No spark WTF?

[Chase77]

All,

My 40 is my 1st auto project and now that ive gotten the body squared away, its on to the mechanical side of things. I have the front all ripped off with everthing but the lights/turns connected and its all just hanging there since there fenders arent on to attached everthing to. I went to start her to keep everything lubed and notta. Pulled a wire and held it to the block and no spark. What gives? Does everything have to be attached to the fender for a grounding issue? The other weird thing is that when i plug in the horn it just blares nonstop. Didnt do that before and now Im wondering if maybe 2 wires are touching somewhere and f'n up the elec that would make the spark. Sorry if this is overly obvious.


Thanks,

Chase

 

[chitown40]

Happened to me when I pulled my fenders off to work on the exhaust. It started one morning, then later that day it wouldn't. No spark. You probably shorted something as you most likely have a spaghetti mess of wires hanging. It's real easy to do. Check the wire that goes to the coil and trace it back. That's a good place to start. My coil wire fried itself and ended figuring out that the P.O. had the coil wire hooked up to the wrong place and it only got spark by some miracle. Nevertheless, found the bad wire, rerouted it, and fixed the prob.

Rob

 

[Chase77]

Cool. Im hopin thats it cause Ive never had any issues so far. Thanks.

 

[1Fine40]

Hopefully, you have a FSM with the electrical diagrams and color codes.....without it, Good Luck....
That being said, when you did your frame off work, did you not re-attach your ground?? Quick way to check is to do a continuity check between the coil negative and the battery negative post. If no continuity, then you gotta do some chasing.......
Have fun!

 

[Pinion]

On the passenger side by the firewall is an inline fuse. Sometimes its buried in the loom. It will be a red/blue wire. Also, there are two wires that go into another holder for two other fuses, close to the same location. Check them. After that, make sure that your coil is grounded. There should be a little tab on the side of the bracket that has a wire coming off of it. Be sure that has a good ground.

The second one is what I traced down a month or so ago. Without that ground, the coil wont send a spark to the distributor.

 

[Chase77]

Check them. After that, make sure that your coil is grounded. There should be a little tab on the side of the bracket that has a wire coming off of it. Be sure that has a good ground.

The second one is what I traced down a month or so ago. Without that ground, the coil wont send a spark to the distributor.

Seeing as how the coil is just hanging with all the rest of it I guess I dont have a very good ground. Guess Ill have to slap on a fender and bolt down the coil. Thanks for the help.