BJ74 Restoration and LHD Conversion has begun!

[torfab]

One more note, the starter solenoid requires a ground wire to engage. Perhaps, instead of adding another relay to interrupt power to the starter solenoid, you can interrupt the white with black stripe wire to the starter solenoid through the clutch switch. This way it keeps it simple and less stuff to go wrong.

ground to clutch switch
clutch switch engages ground when clutch is depressed
wire that ground wire to the starter solenoid

 

[Shes Mad]

Your numbers are correct on the relay, and that SHOULD work fine. The drawing however is incorrect. 85 and 86 are opposite from eachother, and 30 at the bottom with 87 and 87a are the two poles that are ones that go horizontal

http://www.quickconnectproducts.com/relay-wiring-parrot.jpg

Good job adding a clutch starter interrupt though, my wife just started my cruiser and it hit a little jelly bean car in the parking lot. No damage to the 74, but the Aveo she hit was toast.

Thank you very much for your help! I crashed into a car exactly 2 years ago tomorrow starting in gear.. that is why I put the switch in.

I checked the Hella relay The terminals are the same as the drawing

 

[Douglas S]

I checked the Hella relay The terminals are the same as the drawing

Are you absolutely sure? That would be unlike any Bosch-style relay I've ever seen.

 

[Shes Mad]

Are you absolutely sure? That would be unlike any Bosch-style relay I've ever seen.

Another electrical question. Do I need to source 24V spade fuses, or can I use 12V spade fuses

Here is the relay---Hella 4ra 965 400 03 24V 30AMP

 

[torfab]

Have you verified that the relay works?

IMHO - remove that relay and just interrupt the ground to your starter relay instead. It's one less electrical component to fail. It's a much easier and more reliable way to achieve the same result.

 

[Shes Mad]

Have you verified that the relay works?

IMHO - remove that relay and just interrupt the ground to your starter relay instead. It's one less electrical component to fail. It's a much easier and more reliable way to achieve the same result.

It's new--I assume it works.

I have the 2 wires under the dash, so I guess I could just go with a momentary switch that I could hold to start. I just thought a relay would be the way to go because of the amp draw

 

[torfab]

if you interrupt the signal wire to the relay, then there's no amp draw to the starter. Don't break the power wire to or from the starter relay, that will cause problems in the future.

 

[Shes Mad]

DANG--How about the fuse question. Can I use 12V spade fuses

 

[crushers]

a fuse is a fuse so yes ...

 

[Shes Mad]

a fuse is a fuse so yes ...

Cool. Thanks

 

[Shes Mad]

I am getting ready to fire the BJ74 after 2 years. I primed until only fuel came out of the filter. I plan on plugging it in to warm the motor before hitting the key.

Being somewhat cautious, I need to know if there is anything else I need to do before hitting the key. I also need to know how to shut it down if for some reason the key doesn't kill the motor. Just being cautious.

Chime in!

 

[cruiserdan]

I too am curious about manual shut down. Since it's a manual transmission you could stall it by putting it in 3rd or 4th and letting the clutch out while standing on the brakes (assuming you have the brakes back togther and functioning).

 

[Douglas S]

Clamping the fuel line would work.

 

[crushers]

have you ever tried to stall a 3B at full run away using the clutch?
i have, it isn't easy ... at all. i was driving a BJ70 with turbo when it took off, red line. i shoved in the clutch and popped it into 5th and STOOD on the brakes. it barely stalled. scary s***.

leave the feed tube off the turbo.
have a piece of thick aluminum handy.
IF it takes off shove the aluminum piece in front of the inlet of the turbo.
DO NOT get your finger in the way.
this will starve the engine of air, killing it almost immediately.

aluminum, steel, anything thick that won't get sucked into the engine under a LOT of pressure.

HTHs

 

[torfab]

You can manually close the shut off valve at the top of the intake, it will shut it down immediately

Your shut down valve should ve wired in via a VSV then directly to the vacuum pump. To ensure this is working, apply vacuum to the switch then turn the key on and off to see if it closes the valve. The valve is directly above your glow screen

If you absolutely want to stop it with the gearbox, then just put it in 5th gear and pop the clutch Worked for me (although not under full runaway like Crusher - sounds exciting)

 

[cruiserdan]

have you ever tried to stall a 3B at full run away using the clutch?
i have, it isn't easy ... at all. i was driving a BJ70 with turbo when it took off, red line. i shoved in the clutch and popped it into 5th and STOOD on the brakes. it barely stalled. scary s***.

leave the feed tube off the turbo.
have a piece of thick aluminum handy.
IF it takes off shove the aluminum piece in front of the inlet of the turbo.
DO NOT get your finger in the way.
this will starve the engine of air, killing it almost immediately.

aluminum, steel, anything thick that won't get sucked into the engine under a LOT of pressure.

HTHs

I did not consider the run-away part. More like it is idling and the key no-workie.

 

[crushers]

yah, 13BT VSV ... duh. excellent suggestion

run away, yes, i was thinking outside the box on this one.

 

[Shes Mad]

You can manually close the shut off valve at the top of the intake, it will shut it down immediately

Your shut down valve should ve wired in via a VSV then directly to the vacuum pump. To ensure this is working, apply vacuum to the switch then turn the key on and off to see if it closes the valve. The valve is directly above your glow screen

If you absolutely want to stop it with the gearbox, then just put it in 5th gear and pop the clutch Worked for me (although not under full runaway like Crusher - sounds exciting)

You have a picture of that valve just so I am sure? Remember, whatever VSV is running it may be in a different place now

and yes, I was concerned at idle and runaway. Trying to think of everything.

 

[torfab]

I don't have a better picture, but the diaphragm in the red circle pulls the rod which closes the valve. Grab the rod with your hand, pull it towards the diaphragm, and make sure it has free movement before starting the truck.

If the key doesn't turn it off, then you just do it manually

Check that the vacuum hose for this goes to a VSV, which should then be connected to the vacuum pump and that there's no vacuum leak. Check that the VSV gets power with the key on, and no power with the key off.

 

[Shes Mad]

Excellent. Thank you very much