1970 Fuse Box

[DragCat]

Just wondering if this is the correct description for the fuse box. I couldnt find it in my service manual  and some of the letters are worn off on mine . 

[71MonteCarloMD]

Looks correct to me as I couldn’t find my picture before I worked on electronic distributor replacement.

[jft69z]

Hey Mark,

This came out of my '72.

[DragCat]

9 hours ago, jft69z said:

Hey Mark,

This came out of my '72.

Thanks Joe, I'll assume the 72 and 70 are the same lol. Weird its not in the service manuals I have

[Andy's Auto]

70 and 71 do not have the accessory fuse in the top left corner. That started in 72.

[Paul Bell]

21 minutes ago, Andy's Auto said:

70 and 71 do not have the accessory fuse in the top left corner. That started in 72.

This is interesting.

As it's 30 amp, is the red main fuse box feed from the horn relay 10 gauge? For 70 & 71, it's marked as 12 gauge.

Would this replace the separate 10 gauge wire and circuit breaker on the firewall that was installed for power windows and seats (and convertible tops on Chevells)?

[Andy's Auto]

1 hour ago, Paul Bell said:

This is interesting.

As it's 30 amp, is the red main fuse box feed from the horn relay 10 gauge? For 70 & 71, it's marked as 12 gauge.

Would this replace the separate 10 gauge wire and circuit breaker on the firewall that was installed for power windows and seats (and convertible tops on Chevells)?

Not sure, but my 72 Stage 1 convertible not only has the 10 gauge wire from horn relay, it also has two pigtails running from behind the fuse box to power the top and the power seat. Power windows are the same old relay on the firewall powered by horn relay connection.

[Paul Bell]

When a Chevy A-body was factory built with high power drawing accessories such as power seats, windows or convertible top, it received this additional 30 amp power feed with a circuit breaker and 10 gauge wire from the horn relay.

If the 1972 fuse box was updated to include a accessory 30 amp fuse it it, the separate wire and breaker under the hood wouldn't be needed-and this makes sense. But the main fuse box feed wire would need to be 10 gauge with a different fuseable link, not the 12 gauge the 1970 & 71 cars had.

[70mohtecarloowner1]

Wat size fuses does the fuse box for the 70 monte carlo take?

[Paul Bell]

Hey Darren, welcome!

The fuse amperages is marked on the fuse box.

[Pat Tellez]

Have a question what is the fuse voltz/amperage for the instmnt,LPS  fuse ?

[Hnymoonswt]

Hello! Does anyone know where i can find the fuse for the headlights in my 72 monte carlo? They dont work and i cant for the life of me find a fuse. There isnt one that i can see in the fusebox. Thanks!  Jeff

 

[DragCat]

2 hours ago, Hnymoonswt said:

Hello! Does anyone know where i can find the fuse for the headlights in my 72 monte carlo? They dont work and i cant for the life of me find a fuse. There isnt one that i can see in the fusebox. Thanks!  Jeff

 

Jeff, if you look at Joe's post #3 it shows a 72 fuse box. The amp rating in listed for each position. You should be able to find replacement fuses at most auto parts stores, even possibly harbor freight has a kit of glass fuses. While your crouched under the dash test all and replace the ones that are bad 

[Scott S.]

I believe the headlights are on a relay mounted right behind the driver's side headlight..... Next to the horn relay. 

[Scott S.]

While we're on the topic, does the twin orange wire that feeds the under dash courtesy lights plug into the battery connection in the fuse box ?

[Rob Peters]

Jeff,

First and foremost, I noticed this is your first post here on the boards.  We hope you like what you see here and decide to become a full fledged dues paying member of the club.

I could be wrong but it may be the 30 Amp fuse marked "Power  ACC"  Please keep in mind it may not be the fuse.  The light switches have been known to to go bad.  Is it only the headlights that are not working or do none of the parking lights work either?

rob

[jft69z]

I'm pretty sure that the protection for the headlights is a thermal limiter (circuit breaker) in the headlight switch itself. No separate fuses or relays.

[Paul Bell]

The headlights are powered from a 12 gauge red wire in the dash that also feeds the ignition switch.

This red wire is powered from a fuseable link fed from the horn relay.

The headlight switch has a circuit breaker in it.

The short instrument cluster lighting fuse is 4 amps.

[MC-71]

What does LPS stand for? Could it be used for extra lighting? I’m looking at the male terminal on the left bottom of the fuse block.

[Scott S.]

According to "Nasty Z28", LPS is an outlet for added aftermarket lights, or other electric components that you need to add a switch to operate. 

[Dtret]

“ Limited Power Supply”. 

[jft69z]

Right next to it is a spot for 'Inst LPS'.......lamps.

[MC-71]

I have halo headlights that I made. That LPS with a switch would work great for me. Thanks 

[RON T]

Jeff, I had no headlights one night they went out.. had parking lights.. was the dimmer switch.. no brights or dim.. just a thought...

[sbarnette]

8 hours ago, Searsman said:

Jeff, I had no headlights one night they went out.. had parking lights.. was the dimmer switch.. no brights or dim.. just a thought...

Same here. Mine was a loose connection at the dimmer switch.