So I took my dash partially out of my 73 240z to replace my heater hoses. I’ve since replaced the hoses and put the dash back. Now my car won’t crank. When I turn the key, the fuel pump runs and the relay on the passenger side floor clicks as normal but no crank. Any ideas?

2 hours ago, nahurry said:

So I took my dash partially out of my 73 240z to replace my heater hoses. I’ve since replaced the hoses and put the dash back. Now my car won’t crank. When I turn the key, the fuel pump runs and the relay on the passenger side floor clicks as normal but no crank. Any ideas?

Do you have power to anything when the key is in ACC or ON?

Have you checked for voltage at the black/yellow wire for the starter solenoid when someone is holding the key in START?

Start there and tell us what you find.

I’ll check tomorrow, thanks

.65 at the bottom lug and 12 volts on the top lug

Edited July 5Jul 5 by nahurry

1 minute ago, nahurry said:

.65 at the bottom lug and 12 volts on the top lug

You need to add more detail. When, and exactly where? There are three "lugs". Actually two lugs and a spade. SteveJ is asking about the spade (black and yellow wire). With the key at Start.

The 12 is a good sign though.

As @Zed Head said, pull the spayed ign. Off the terminal and measure the voltage. Black to Gand and red on the spade turn the key to start.