1976 Fiat 124 relays

[btexpress]

Are the relays located on the drivers side fender weld (6 all together) interchangeable? I know they will fit but not sure about the amperage. My fuel pump relay is making a squealing noise and it makes the input to the coil jump from 4 to 10 volts. If I pull the relay out there is no power to the coil. I am going to order one tomorrow and if they are interchangable I will get an extra. There may be another in that 6 pack of relays that is bad. I know 10 volts is not enough to operate the coil properly but I have to start some where. My second plan is to inspect the switch or should that be first. Maybe low voltage from the switch is causing the relay to squeal? Any comments will be appreciated.

[BEEK]

no, not all relays are interchangeable, you have to look at the numbers on top of the relay, somewhere there is an interchange list, im sure brad artigue has it in his stuff. but the functions of some relays are different. some are normally open, some are normally closed, some switch between 2 contacts.. you get the idea... yet they all look the same on the outside mostly except for the number of plugs. some relays have the schematic on the outside.

[So Cal Mark]

sounds like a bad ground for that relay. More than likely you have ground issues throughout the car and voltage drops at various connections

[btexpress]

I will get a replacement relay for the fuel pump and look for a bad ground this week end. This car has had a 80 motor put in a 76 124 and there are loose plugs all over. Come to think of it I think a bad ground is the problem. It has a wire straight from the fast idle stop to the distributor. If that is unpluged no power to the distributor but plug it in and I get the of 4 to 10 volt movement at the distributor. Thanks for your info.

[johndemar]

I agree with Mark, with Fiat it's almost always a ground. Best place to start anyway. The 76 doesn't have ground pods like the newer cars so there are a lot of individually grounded wires. Closest one to the relays is one of the nuts that holds the metal relay plate to the fender.

[btexpress]

I will take a look at the ground by the relays. My moto is easy stuff first. I am also going to check to make sure the switch is grounded. I think there is a ground on the switch. can't get to it till Saturday but it is always good to have a plan. Thanks again. ...

[Daniel]

Most of the relays are the same it's a bosch design with a normally closed position and powered on open circuit
layout between the 30 87 and 87a terminals. 85 and 86 and the trigger from the switch / source. I still use these
relays for a lot of things and buy them really cheap from one of my wholesalers $1 each. I thought of helping
people out on here and making an offer to buy a large sum and get a few groups of people to distribute them.
Not sure if this is feasible but i wouldnt mind doing it to help out the fiat spider owners on here.

[westy64]

There are still 2 types of original relays on Prunette.
Sipea 0440 are normally open relays
Sipea 0444 are normally closed relays

I like these Sipea relays, in their aluminium cases.
Look shiny after a soft brushing with iron mesh.
I would like to keep them in place (and have modern spares in the glove box).