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Posted by: Qarl Aug 31 2003, 07:03 PM

Does anyone know what is significantly or fundamentally different about main body wiring harnesses from 1974 to 1975.

The engine harness doesn't count.

What's different?

Thanks!

Posted by: URY914 Aug 31 2003, 07:04 PM

Is there a prize involved?

Posted by: Jeff Bowlsby Aug 31 2003, 07:13 PM

Guesses:

1. The 75 harness would not have the 'Fasten Seatbelt' wiring as in the 74 harness?
2. The 75 Catalytic converter cars (California only?) would have wiring for the cat and dash light...the 74 would not.

Posted by: Qarl Aug 31 2003, 07:33 PM

My '75 has the fasten seatbelt light.

And no cat dash light.

Posted by: vsg914 Aug 31 2003, 07:35 PM

so does mine

Posted by: Qarl Aug 31 2003, 08:01 PM

But I do have the wiring for the EGR counter under the passenger foot rest.

Posted by: Qarl Aug 31 2003, 08:44 PM

What about the ignition switch? I know the '75 and '76 cars used a VW Rabbit ignition switch. Are the connectors different?

Posted by: scotty Aug 31 2003, 08:49 PM

My early 75 had the same wiring harness as a 74 as far as I could tell... including that stupid seatbelt interlock crap

Which part's giving you trouble, Karl?

Posted by: vsg914 Aug 31 2003, 08:53 PM

The connections are the the same. I've put the rabbit switch in a 73 and a 74. It's also about 1/4 the price!

Posted by: Qarl Sep 3 2003, 03:09 PM

Our good friend George says the '75/'76 harnesses are "significantly different" than the earlier harnesses.

Other than the EGR wiring and the seatbelt buzzer crap (also on '74s), I fail to see what is different between a '74 and '75 main chassis harness.

Yes... maybe the wiring order is different, but could you effectively install a '74 harness in your '75 car and have everything work? Everything that plugs into the harness (light housings, switches, door sensors, brake switches, fuel fillers, gauges, is the same).

Since I'm not using the relay board, what's the real difference then?... Hmmm????

Posted by: Bleyseng Sep 3 2003, 05:13 PM

I thought the wiper switches were different? maybe not..
I don't see what could go wrong with using a 74 harness.

Geoff

Posted by: SirAndy Sep 4 2003, 12:46 AM

i put a '73 harness in a '70 car and it works great, just needed quite a bit of
soooo, '74 to '75 should be no problem at all ...

Andy