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go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1173
Experience:  Technican with 20 years experience focused on engines and electrical.
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I m having issue with the engine brake on detroit 60 series,

Customer Question

HelloI m having issue with the engine brake on detroit 60 series , cruise control work fine
Submitted: 6 months ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 6 months ago.
Good morning
Do they work at all
On half?
Customer: replied 6 months ago.
Not at all
Expert:  go-west.. replied 6 months ago.
Manual or auto trans?What model of truck is this engine in?
Customer: replied 6 months ago.
Manual freightliner Coronado
Expert:  go-west.. replied 6 months ago.
What transmission?
Customer: replied 6 months ago.
Eaton 13speed
Customer: replied 6 months ago.
No fault code
Expert:  go-west.. replied 6 months ago.
OK and thanks
I suspect you have a open on your engine on off switch. We will have to do some wire checks
I'll need the last 6 of your vin and tell me how have connectors you have at your engine control module. Ty
Customer: replied 6 months ago.
GD3658
Expert:  go-west.. replied 6 months ago.
How many connectors are on the ecm?
Customer: replied 6 months ago.
3 on each side
Expert:  go-west.. replied 6 months ago.

ok

infront on the passenger this the pdm

there is a relay there called a retarder relay and if its in backwards of missing the brakes wont work,but hears the kicker,its not marked,When the cover is opened and you look in,look at the relay bank thats is closest to you,the ones thats are not marked,is the one,

https://www.dropbox.com/s/2c0640x4e2g1w2u/retarder%20relay.pdf?dl=0

have a look

Customer: replied 6 months ago.
There are five relays
Expert:  go-west.. replied 6 months ago.

look for the one that has wires 81 c and 376 r going to it

Customer: replied 6 months ago.
I tried swapping
Customer: replied 6 months ago.
I found the relay with that wire
Customer: replied 6 months ago.
Installed new relay still not work
Expert:  go-west.. replied 6 months ago.

please take a picture of all 5 please,i want to make sure they are in the correct position before moving on

please tell me all the wire numbers at that relay

Customer: replied 6 months ago.
Customer: replied 6 months ago.
Customer: replied 6 months ago.
Customer: replied 6 months ago.
Customer: replied 6 months ago.
Wire num
N10#1512
376r#1701
81c#1102
N10#1512
Customer: replied 6 months ago.
2 wires are same num
Expert:  go-west.. replied 6 months ago.

nice pics

please put a jumper between n10 wires and retest

take a picture of your shifter for me

and the switch panel that has the engine brake switches.

when you test it made sure you are on the road and not it the shop,some jakes wont work when truck is standing still

Customer: replied 6 months ago.
U want gear shifter pic
Customer: replied 6 months ago.
Eng brk
Expert:  go-west.. replied 6 months ago.

ty

Customer: replied 6 months ago.
Shifter
Customer: replied 6 months ago.
It didn't work
Expert:  go-west.. replied 6 months ago.

ok if it didn't work by doing the jumper,leave it in there,and we will carry on,

one thing though you showed me those wires for the retarder relay and they said n 10

thats it a cummins number and you said you had a detroit engine has the engine been swapped by chance ??

Customer: replied 6 months ago.
Never swapped its original but it's a glider kit
Expert:  go-west.. replied 6 months ago.
Something is weird looks like it's wired for a CumminsDo you have Detroit software?
Customer: replied 6 months ago.
Expert:  go-west.. replied 6 months ago.
Awesome.
Verify the engine brake, service brake, clutch switch, are working properly, I know that you said the Cruz works but I want to make sure
Customer: replied 6 months ago.
I m going home now ll do tomorrow
Expert:  go-west.. replied 6 months ago.
OK
Customer: replied 6 months ago.
Hello I did test drive again today engine brake work fine when you press little foot paddle
Expert:  go-west.. replied 6 months ago.
The brakes?
Customer: replied 6 months ago.
Customer: replied 6 months ago.
When i press foot paddle relay klick and engine brake work
Customer: replied 6 months ago.
Expert:  go-west.. replied 6 months ago.

alright

turn that parameter off,

Customer: replied 6 months ago.
Then it don't gonna work at all
Expert:  go-west.. replied 6 months ago.

turn it off and then take for a road test, step on the brake and tell me if it comes on,you might have the wrong pressure switch installed for service brake

Customer: replied 6 months ago.
It's started working fine now
Expert:  go-west.. replied 6 months ago.

NICE !

543 is the wire that goes to the service brake switch at the air manifold

You need a nc switch

Customer: replied 6 months ago.
I didn't do any thing I just put everything back
Customer: replied 6 months ago.
Didn't touch the brake switch
Expert:  go-west.. replied 6 months ago.

magician!!

Good job

Customer: replied 6 months ago.
Is it could be any wire loose
Expert:  go-west.. replied 6 months ago.

I think it was that parmeter

Customer: replied 6 months ago.
No I changed to test it
Expert:  go-west.. replied 6 months ago.
Did you wiggle the wires at the pressure switches?
Customer: replied 6 months ago.
No
Expert:  go-west.. replied 6 months ago.
Make sure the wires at the Jake switch aren't spread.
Expert:  go-west.. replied 6 months ago.

Good morning

hows it working?

still ok?

Customer: replied 6 months ago.
I send the truck for trip
Customer: replied 6 months ago.
Waiting for it to come back
Expert:  go-west.. replied 6 months ago.

nice..

Expert:  go-west.. replied 6 months ago.

Let me know the outcome,if you can

thanks

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