Relay wiring madness

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zonker
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Re: Relay wiring madness

Post by zonker » Thu Jan 10, 2019 9:55 pm

friedman wrote:
Thu Jan 10, 2019 8:24 am
While I agree with the use of relays and I usually relay the headlights, I am also anti extra wiring. The 75s had a starter relay (removed by previous owner) radiator fan relay which later spiders did not have. I think the electric pump relay is good in theory but over fiddly and I had a 128 that died on me on a rainy night because the oil light sending unit died and sent a false kill message to the fuel pump.
I can empathize with cleaning up and making things simple - the '71 I am raising from the dead had a rat or mouse living under the dash above the fuse panel, and the previous owner's dog ate and tore up the dash trying to get to the rodent. When I got the car the gauges were dangling on their harness and what was left of the dash was two 6" sections nearest the windshield pillars.

Needless to say I am right with you on tracing down important wires and getting to the nitty gritty of full electrical operation. So far it looks like the rodent liked the firewall insulation more than he liked wires, but I have found two wires so far chewed up and am still looking for more.

For reliability's sake I'm making sure the starter, radiator fan, dizzy with fuel pump, headlamps, and starter are all getting relays, I'm also bringing an additional 8 gauge power wire in from the battery so the old 40+ year old 10 gauge wires get a little load help. I did a similar wiring setup with my X1/9, and it's been 100% reliable with no glitches whatsoever.
1971 124 Spider(s) 1608
2017 124 Spider Classica
2013 500e
1978 X1/9
1974 X1/9
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friedman
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Re: Relay wiring madness

Post by friedman » Fri Jan 11, 2019 8:29 am

The law of mission creep is alive and well in this project.

1 Let's remove all the unneeded wires and relays in the engine bay.
2 Let's remove all the harness wrap tape in the engine bay to deal with 1.
3 Let's go to the inside of the firewall and start to untape the harness to continue on with 2
4 Let's pull off the steering wheel column to help with 3
5 Let's pull the gas pedal assembly and pedal box to help with access to 3
6 Let's do my patented "make an access panel in the cowl to get to the clutch cable connection to the clutch pedal" mod so I can finish 5
7 Let's plan on this project taking longer than I thought but who cares
8 Oh, in regard to 4, did you know a 75 spider does not have harness connectors for the ignition switch, you pull the wires off the switch separately.

Apparently I'm in denial of fixing the floors and doing almost any miserable job I can find to do instead.
Carl in Virginia
75 spider
86 Bertone
77 X1/9
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atruscott
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Re: Relay wiring madness

Post by atruscott » Fri Jan 11, 2019 9:45 am

On headlight relays - a nice modern alternative is to swap the bulbs (just the bulbs) for H4 style LEDs. Much lower current draw and supremely good. Just done it on the 85, and they really work well.

If you’d like some floor inspiration..... taken yesterday.....
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1970 238 Camper OHV
1974 124 Wagon TC
1974 124 Special TC
1975 124 Sport Coupe
1976 124 Sport Spider (The Racer)
1981 Spider 2000 (The Resurrected)
1985 Pininfarina Azzurra
2017 124 Spider Abarth Elaborazione
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cgranju
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Re: Relay wiring madness

Post by cgranju » Fri Jan 11, 2019 10:31 am

I still need to try the set of those I picked up, thanks for the reminder!

On a 124 Spider, cooling could be a little bit of an issue, or perhaps modifying the headlight bucket for cooling could be the issue.

But, Carl, do you drive at night?
Chris Granju
sunny East TN
owner of a number of Fiats built prior to 1986
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friedman
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Re: Relay wiring madness

Post by friedman » Fri Jan 11, 2019 11:12 am

No night driving or in the rain but I probably will install the usual Euro H4s and a simple relay kit for the headlights.
I keep forgetting it's my middle daughter's car, she keeps reminding me of that as she has paid me $40 for it. This is the kid who set the red X free to kill a lamp post on our street. My older sister is visiting and she says she wants it! Funny how no one ever wanted any X I had around here.
Carl in Virginia
75 spider
86 Bertone
77 X1/9
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lanciahf
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Re: Relay wiring madness

Post by lanciahf » Fri Jan 11, 2019 12:44 pm

friedman wrote:
Fri Jan 11, 2019 11:12 am
Funny how no one ever wanted any X I had around here.
Found this out with the Scorpion, most women do not like wedge shape cars. They like the round shape of the spider with chrome accents. Shinny is good.

My wife hated that scorpion but loves my spiders. I tried to explain the superior mid engine design but was met with a blank stare and “I don’t even know why you bought that thing “
Ralph DeLauretis
2013 Fiat 500 POP
1984 Pininfarina Spider
Recovering Scorpion Owner.
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davedecker4
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Re: Relay wiring madness

Post by davedecker4 » Fri Jan 11, 2019 2:09 pm

Well as long as you have all those wire out of the way, its a great time to weld in the new floors (or patches) and not have to worry about frying them. ;)
Dave Decker
a 'couple' Fiats and Lancia's
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Re: Relay wiring madness

Post by davedecker4 » Fri Jan 11, 2019 2:15 pm

friedman wrote:
Fri Jan 11, 2019 11:12 am
Funny how no one ever wanted any X I had around here.
My wife hated that scorpion but loves my spiders. I tried to explain the superior mid engine design but was met with a blank stare and “I don’t even know why you bought that thing “
[/quote]

I had the same thing. Then I let her drive it. Passing a truck at 80 going up the Siskiyou's in 5th seemed to have turned the corner just enough that she decided it wasn't so bad after all.
Dave Decker
a 'couple' Fiats and Lancia's
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cgranju
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Re: Relay wiring madness

Post by cgranju » Fri Jan 11, 2019 3:00 pm

lanciahf wrote:
Fri Jan 11, 2019 12:44 pm
friedman wrote:
Fri Jan 11, 2019 11:12 am
Funny how no one ever wanted any X I had around here.
Found this out with the Scorpion, most women do not like wedge shape cars. They like the round shape of the spider with chrome accents. Shinny is good.

My wife hated that scorpion but loves my spiders. I tried to explain the superior mid engine design but was met with a blank stare and “I don’t even know why you bought that thing “
what's funny to me is my wife's favorite Fiats I own happen to be the two I purchased from Carl. Apparently, Carl is her preferred "builder"...no kidding.
Chris Granju
sunny East TN
owner of a number of Fiats built prior to 1986
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friedman
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Re: Relay wiring madness

Post by friedman » Sat Jan 12, 2019 8:54 am

CG, show her the pics of the smooshed Xs and tell her you are negotiating to get them and see if I'm still on her list!
Carl in Virginia
75 spider
86 Bertone
77 X1/9
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