260z doesn't crank

[zcool1]

NEW 1974 260z owner

just got it last week.

replaced :

fuses,ignition coil,spark plugs, wires , distributor cap & rotor, ignition switch.

new battery .

only hear clicking on inside of car (passenger side)

tested started is good and can turn crank by hand.

cant figure out what is causing car not to crank and starter is not engaging.

PLEASE HELP!! all help appreciated.

Btw i did do a search and use google which led me to this forum .

[Zed Head]

The 260Z's apparently are known for having weak voltage to the starter solenoid. Some people recommend a relay to get full battery power to it.

Here's a couple of links describing a solution -

"Click, Click - No Start" Fixed!! Tony D - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z

Ford Starter Solenoid? - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z

Of course, if your battery is weak, the problem gets even worse. Are you sure it has a full charge?

[zcool1]

Thank you zed head for the response.

The battery is at full charge i made sure to have the trickle charger on it for 2 days and i checked with a volt meter.

sorry if i forgot to mention this but the starter did not make any noises .

i even took off the starter today and had it tested then removed radiator fan to turn the crank by hand to make sure it wasnt seized.

Because the autoparts store guy was saying startings only spin up to 40lbs anything more and it wont spin.

ill be checking if theres enough power going to starter tomorrow after noon then i will post updates

my first carburetted car so im really at a lost .

[bartsscooterservice]

have you tried a loose thick cable from the + of the battery directly to the starter, to see if the engine is cranking? If so, it's somewhere in the wiring after the relay.

[SteveJ]

I think the key to this is the fact that it's a 74.

Search through these results: seatbelt interlock site:classiczcars.com - Google Search

Also download the FSM from XenonS30. Go to the BE section and start reading on page 30.

[Reverend]

Bad ignition switch.

[zcool1]

Bad ignition switch.

thanks for more input guys

as stated in first post ignition switch has been replaced with new one.

now i will check for power to starter today and where about would i find this relay for starter?

[SteveJ]

Do the research first in the FSM. You will see what you should try next.

[LeonV]

First Test: short the starter + and solenoid spade terminals with a screwdriver and see if it spins.

Second Test: measure voltage to solenoid with key at START. If it's less than 10V, there is too much voltage drop. If it's zero, then it could be wiring, interlock, etc.

I wired in a $5 relay to solve this issue on my 260Z. I've also disabled the interlock.

[SteveJ]

Heck, Leon. I'd just push a button as the first test with a 74.

I'd be willing to bet money that the interlock is what is dropping the voltage to the solenoid, too.

[zcool1]

thanks for the info leon & steve

i checked voltage to starter big blue positive cable has 12 volts , the spade has zero when i had a friend turn the key to start. also the button for emergency start in the engine bay is broken .

No idea if it even works.

how would i go about bypassing this interlock with a relay??

[LeonV]

Heck, Leon. I'd just push a button as the first test with a 74.

I'd be willing to bet money that the interlock is what is dropping the voltage to the solenoid, too.

Very well could be!

My EDIS module and relay/fuse panel rests where that button used to be...