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Car Forum / Volvo Cars / March 2006

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Does my 1987 Volvo 740 GLE have ABS (Antilock Brakes)?

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jamiebabineaux@gmail.com - 24 Feb 2006 20:13 GMT
I have only had the car a couple weeks and hardly driven it. I have no
idea. I am looking at brakes online and it matters if the car has ABS.

Thanks!
Peter K L Milnes - 25 Feb 2006 01:29 GMT
Have a look under the trunk floor on right hand side. If it contains an ABS
modulator unit and a few hydraulic pipes then it has ABS. However on your
car it may well be under the hood, either side of the compartment near strut
tower(s). If it has none of these things it does not have ABS.

All the best, Peter.

700/900/90 Register Keeper,
Volvo Owners Club (UK).

>I have only had the car a couple weeks and hardly driven it. I have no
> idea. I am looking at brakes online and it matters if the car has ABS.
>
> Thanks!
James Sweet - 25 Feb 2006 03:07 GMT
> I have only had the car a couple weeks and hardly driven it. I have no
> idea. I am looking at brakes online and it matters if the car has ABS.
>
> Thanks!

My '87 Turbo does, but it was a fairly rare option on the 740s. You can
look for the ABS modulator under a wood cover under the carpet in the
side of the trunk, but it's easier to just get out on an empty road,
preferably wet, get it up to about 25 mph and slam on the brakes. If it
has ABS you'll hear it chatter and feel in the pedal.
Per Hauge-Nielsen - 25 Feb 2006 09:49 GMT
>I have only had the car a couple weeks and hardly driven it. I have no
> idea. I am looking at brakes online and it matters if the car has ABS.
>
> Thanks!

If your car is fitted with ABS there should be a warning light for ABS
malfunction, this should be on when ignition key is turned prior to starting
just like all the other warning lamps.

Regards

Per Hauge
Andy Dingley - 28 Feb 2006 01:17 GMT
>If your car is fitted with ABS there should be a warning light for ABS
>malfunction, this should be on when ignition key is turned prior to starting
>just like all the other warning lamps.

Isn't this light fitted anyway ?   My '89 UK 740 estate has the light
but no ABS.  There's no exhaust cat either, but I have that warning
light too !
jamiebabineaux@gmail.com - 28 Feb 2006 01:43 GMT
I haven't been able to test it yet, but I think he means when you turn
the key, if you have it the light should come on for a few seconds as a
system check. If you don't, the light will not illuminate.

Just my guess...
Per Hauge-Nielsen - 28 Feb 2006 17:14 GMT
> Isn't this light fitted anyway ?   My '89 UK 740 estate has the light
> but no ABS.  There's no exhaust cat either, but I have that warning
> light too !

This is interesting. The ABS warning lamp is lit when grounded via the ABS
control module, and positive feed from ignition key switch. If you have ABS
light, I would have hard to believe you don't have ABS, and if light goes
out when engine is started, I would say even a working ABS.
What does the light look like, color and text?

The check engine light is not related to the exhaust cat, but is lit when
either igniton or fuel injection module has detected an error.

Regards

Per Hauge
byrocat - 28 Feb 2006 20:42 GMT
Not sure if you've gotten your answer, but there is a very simple test
if you live in Northern Climates.

Find a large parking lot or sidestreet without cars or other obstacles
around, with a layer of slippery snow or light ice. Drive up to about
30kmh and hit the brakes HARD!

If you get a shuddering through the pedals as you go sliding along, the
odds are that you've got ABS.

If there's no shuddering, no ABS.

Local newspaper covered ABS and described the driving technicque needed
is not pumping the brake pedals, but "stomp and steer".
jamiebabineaux@gmail.com - 28 Feb 2006 21:44 GMT
Thanks, yes that would surely do it. My issue is that I bought the car
a couple weeks ago and don't have the car with me. It's been at the
mechanics and I was trying to find out how to tell without actually
having the car with me.

I thought perhaps all 1987 740 GLE models either had them, or they did
not.
James Sweet - 01 Mar 2006 07:49 GMT
> Thanks, yes that would surely do it. My issue is that I bought the car
> a couple weeks ago and don't have the car with me. It's been at the
[quoted text clipped - 3 lines]
> I thought perhaps all 1987 740 GLE models either had them, or they did
> not.

It was an expensive option, available but certainly not all of them had it.
jamiebabineaux@gmail.com - 01 Mar 2006 14:02 GMT
Just curious, what is the name of that large drum-like object between
the master cylinder and the firewall? It's been driving me nuts. I
always thought THAT was the master cylinder, but it turns out it is not.
User - 02 Mar 2006 01:48 GMT
> Just curious, what is the name of that large drum-like object between
> the master cylinder and the firewall? It's been driving me nuts. I
> always thought THAT was the master cylinder, but it turns out it is not.

Vacuum brake booster. The master cylinder is the gizmo with pipes
attached that bolts to the front of it.

Bob
Signature

The goal when driving is to miss the maximum number of objects.

Michael Pardee - 02 Mar 2006 01:58 GMT
> Just curious, what is the name of that large drum-like object between
> the master cylinder and the firewall? It's been driving me nuts. I
> always thought THAT was the master cylinder, but it turns out it is not.

That's the vacuum booster, often just called a "brake booster." You've heard
of "power brakes" - that's the part that makes them power.

Mike
James Sweet - 02 Mar 2006 02:43 GMT
>>Just curious, what is the name of that large drum-like object between
>>the master cylinder and the firewall? It's been driving me nuts. I
[quoted text clipped - 4 lines]
>
> Mike

Which reminds me, if you ever go to rope tow the car, or your engine
conks out while moving at high speed or down a hill, prepare for the
braking effort to be MUCH heavier as soon as you run out of vacuum in
the booster. It'll feel like there's a block of wood stuck under the
brake pedal.
Andy Dingley - 03 Mar 2006 21:41 GMT
>>>Just curious, what is the name of that large drum-like object between
>>>the master cylinder and the firewall? It's been driving me nuts. I
>>>always thought THAT was the master cylinder, but it turns out it is not.
>>
>> That's the vacuum booster, often just called a "brake booster." You've heard
>> of "power brakes" - that's the part that makes them power.

Or "brake servo" here in the UK.

>Which reminds me, if you ever go to rope tow the car, or your engine
>conks out while moving at high speed or down a hill, prepare for the
>braking effort to be MUCH heavier as soon as you run out of vacuum in
>the booster.

That's for most cars. On my Volvo (740) it's not MUCH heavier it's
INCREDIBLY heavier. I've never known a car with such heavy brakes,
unassisted (except possibly my Citroen 8-)  )

Half of my other cars are old enough they don't have brake servoes
anyway.
Andy Dingley - 03 Mar 2006 21:39 GMT
>> Isn't this light fitted anyway ?   My '89 UK 740 estate has the light
>> but no ABS.  There's no exhaust cat either, but I have that warning
>> light too !

>What does the light look like, color and text?

Both red, with lettering "ABS" and the catalyst symbol.

I think they were options at the time (UK, '89) but mine has never had
either fitted.
 
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