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Old 03-07-2010, 04:27 PM
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Hot wire to the HEI

Please be patient I'm really stupid when it comes to wires. Can I run a wire from the battery to a toggle switch and from the switch direct to the hei or do I have to put a relay in ?

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Old 03-07-2010, 04:39 PM
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Quote:
Originally Posted by redneckhotrods
Please be patient I'm really stupid when it comes to wires. Can I run a wire from the battery to a toggle switch and from the switch direct to the hei or do I have to put a relay in ?
You don't need to do all that. Just run the wire from a 12 gauge supply wire (so it will be fused and thick enough for the power level the hei will draw) from a switched source that is 12 volts hot in key-on and key-start. A multi-tester/volt-meter can verify that. The diagram I posted in the other thread was no help? It is the typical way full size jeepers do the hei conversion, but your 74 may be a little different.

If nothing else, post your question in a Jeep forum they will be more familiar with the wiring system and can probably give you a typical place to pull power from because an hei conversion is a real common mod.
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Old 03-07-2010, 05:37 PM
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hei

Yes. No relay needed. heavier wire. 8 or 10 ga. Pos side of batt.
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Old 03-07-2010, 05:39 PM
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Quote:
Originally Posted by redneckhotrods
Please be patient I'm really stupid when it comes to wires. Can I run a wire from the battery to a toggle switch and from the switch direct to the hei or do I have to put a relay in ?

It won't draw enough current to need a relay.
Provided it's not to small a wire, you can wire it to a switch like you asked about.

Like a previous poster mentioned, an ignition switched terminal in the fuse box would be preferred, but without knowing you application, it may not apply.
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