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FerrariChat.com » Technical Q&A Archives » Archive - May thru December 2001 » 308 GT4 Brake failure light « Previous Next »

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'75 308 GT4 (Peter)
Posted on Wednesday, August 01, 2001 - 2:56 am:   

Whoever did it, did a great job! Looks good.

Sounds like its relay "F" (on the top, right-hand corner of the board) acting-up.
Rolly Astrom (Swede)
Posted on Tuesday, July 31, 2001 - 9:19 pm:   

After checking the reservoir levels and looking for leaks in lines and at the 4 corners, I suspect the culprit is the dastardly valve. The light does fluctuate from off, to flickering, to on, independently it seems, of pedal pressure. So, I don't think the brakes are a problem, but I will have to exorcise the valve demons.

The car is a North American Dino that (lucky for me) had a very good conversion to Euro bumpers, including rear fenders, about 12 years ago.
'75 308 GT4 (Peter)
Posted on Tuesday, July 31, 2001 - 3:09 am:   

Could be the brake-pressure limiting valve acting-up. This could cause excess pressure to build for the rear circuit and trip the switch that's mounted on the front fire-wall (only seen from below the car).

PS: I checked your photo of your car, sweet. Is it a Euro with US side-marker lights or a US car with Euro bumpers?
Rolly Astrom (Swede)
Posted on Monday, July 30, 2001 - 6:58 am:   

The red brake failure light suddenly appeared during a drive yesterday (not the emergency brake light, but a twin on the other side of the speedo gauge). Brakes still worked fine, perhaps, just perhaps a little spongier. Any thoughts on steps to diagnose the true evil that lurks? Much thanks.

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