North American Turbocoupe Organization



Power Brakes not working?
pederb Offline
Member
#1
My PB stopped working the other day and is this a common problem on these? Any idea how to repair this or do I need to replace the whole thing?

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-Peder Beckman-
Technical Director
American Iron Racing
-Peder Beckman-
Technical Director
American Iron Racing
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Pete D Offline
Administrator
#2
By "stopped working" do yo mean the pedal got real hard and it takes a great deal of push to get the car to stop.

If that is it, then take a look here:
http://www.turbotbird.com/FAQPage/FAQpag..._Diagnosis

Relay part number: http://natomessageboard.com/Forum12/HTML/000054.html
Pete Dunham


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pederb Offline
Member
#3
Yes that is right.

Were is this relay located?

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-Peder Beckman-
Technical Director
American Iron Racing
-Peder Beckman-
Technical Director
American Iron Racing
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Pete D Offline
Administrator
#4
Under the black plastic cover immediately below the vacuum tree. There are 2 relays ther. I think you want the one toward the front of the car
Pete Dunham


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jmthunderbirdturbo Offline
Posting Freak
#5
wow, i didnt know they did that. mine just f**king runs the damn abs pump over and over untill the thing kills the battery over night. oh well. check your fluid too and maybe bleed the lines if the relay thing dont work.

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1987 5.0 sport coupe, intake, exaust.
1987 tc, goldie, stock 5 spd.
1987 3.8, convertabird project car.
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1988 TC 5MT-Blue/Blue check-off car. resto-project.
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pederb Offline
Member
#6
Great!

Thxs

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-Peder Beckman-
Technical Director
American Iron Racing
-Peder Beckman-
Technical Director
American Iron Racing
Reply

Ryan H Offline
Posting Freak
#7
Quote:Originally posted by jmthunderbirdturbo:
wow, i didnt know they did that. mine just f**king runs the damn abs pump over and over untill the thing kills the battery over night. oh well. check your fluid too and maybe bleed the lines if the relay thing dont work.


The relay is probably sticking then [Image: smile.gif]

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Ryan Harris

1988 TC 5 speed, all options including sunroof, Walbro 255 LPH HP, Star stage III, bypassed BCS and lots of love Big Grin
'88 TC Smile Walbro 255HP, Stinger FMIC, PIT BOV, Pro 5.0, Kirban, RR cam, FRPP strut tower brace, T3
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Jeff K Offline
Administrator
#8
Ryan is correct.... the ONLY way for the pump to run with the key off is if the relay is stuck shut. Replace the relay and your problems should be solved. If you get a new relay from Ford, I believe they call it an "anti-skid relay".

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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pederb Offline
Member
#9
Well I replaced the relay but nothing, is there a fuse or circuit breaker for this? The relay was ticking very loud before it went dead.

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-Peder Beckman-
Technical Director
American Iron Racing
-Peder Beckman-
Technical Director
American Iron Racing
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JT Offline
Posting Freak
#10
Few things to check:

1) There is a Tan/Yellow wire at the hydraulic relay. This circuit is hot at all times, and is feed through a fuse link. Make sure you see positive 12 volts at that wire.

2) Turn the Ignition Key ON, and check for positive 12 volts at the Grey/Yellow wire at the hydraulic relay. This circuit is feed from a fuse link as well, whenever the Ignition Key is ON

3) Pump the brake pedal several times with the ignition key off. Now check to see if the Pink/Light Blue wire at the hydraulic relay is getting a ground.

4) Check to ensure that the Grey wire at the hydraulic relay is getting a good, continuous, ground.

[This message has been edited by JT (edited 03-16-2005).]
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