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go-west..
go-west.., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1232
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: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  go-west.. replied 1 year ago.
Good morning
Do they work at all
On half?
Customer: replied 1 year ago.
Not at all
Expert:  go-west.. replied 1 year ago.
Manual or auto trans?What model of truck is this engine in?
Customer: replied 1 year ago.
Manual freightliner Coronado
Expert:  go-west.. replied 1 year ago.
What transmission?
Customer: replied 1 year ago.
Eaton 13speed
Customer: replied 1 year ago.
No fault code
Expert:  go-west.. replied 1 year 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 1 year ago.
GD3658
Expert:  go-west.. replied 1 year ago.
How many connectors are on the ecm?
Customer: replied 1 year ago.
3 on each side
Expert:  go-west.. replied 1 year 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 1 year ago.
There are five relays
Expert:  go-west.. replied 1 year ago.

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

Customer: replied 1 year ago.
I tried swapping
Customer: replied 1 year ago.
I found the relay with that wire
Customer: replied 1 year ago.
Installed new relay still not work
Expert:  go-west.. replied 1 year 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 1 year ago.
Customer: replied 1 year ago.
Customer: replied 1 year ago.
Customer: replied 1 year ago.
Customer: replied 1 year ago.
Wire num
N10#1512
376r#1701
81c#1102
N10#1512
Customer: replied 1 year ago.
2 wires are same num
Expert:  go-west.. replied 1 year 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 1 year ago.
U want gear shifter pic
Customer: replied 1 year ago.
Eng brk
Customer: replied 1 year ago.
Shifter
Customer: replied 1 year ago.
It didn't work
Expert:  go-west.. replied 1 year 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 1 year ago.
Never swapped its original but it's a glider kit
Expert:  go-west.. replied 1 year ago.
Something is weird looks like it's wired for a CumminsDo you have Detroit software?
Customer: replied 1 year ago.
Expert:  go-west.. replied 1 year 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 1 year ago.
I m going home now ll do tomorrow
Customer: replied 1 year ago.
Hello I did test drive again today engine brake work fine when you press little foot paddle
Expert:  go-west.. replied 1 year ago.
The brakes?
Customer: replied 1 year ago.
Customer: replied 1 year ago.
When i press foot paddle relay klick and engine brake work
Customer: replied 1 year ago.
Expert:  go-west.. replied 1 year ago.

alright

turn that parameter off,

Customer: replied 1 year ago.
Then it don't gonna work at all
Expert:  go-west.. replied 1 year 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 1 year ago.
It's started working fine now
Expert:  go-west.. replied 1 year ago.

NICE !

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

You need a nc switch

Customer: replied 1 year ago.
I didn't do any thing I just put everything back
Customer: replied 1 year ago.
Didn't touch the brake switch
Expert:  go-west.. replied 1 year ago.

magician!!

Good job

Customer: replied 1 year ago.
Is it could be any wire loose
Expert:  go-west.. replied 1 year ago.

I think it was that parmeter

Customer: replied 1 year ago.
No I changed to test it
Expert:  go-west.. replied 1 year ago.
Did you wiggle the wires at the pressure switches?
Customer: replied 1 year ago.
No
Expert:  go-west.. replied 1 year ago.
Make sure the wires at the Jake switch aren't spread.
Expert:  go-west.. replied 1 year ago.

Good morning

hows it working?

still ok?

Customer: replied 1 year ago.
I send the truck for trip
Customer: replied 1 year ago.
Waiting for it to come back
Expert:  go-west.. replied 1 year ago.

nice..

Expert:  go-west.. replied 1 year ago.

Let me know the outcome,if you can

thanks