OMG! 190E SEES DAYLIGHT!

[Cavcraft]

Well, sort of. The bloody thing's been sat in the garage a couple of years and not been anywhere since the fuel pump was suspected to have thrown it's hand in.

Some Google type shenanigans, and a chance meeting with top geezer who runs a Merc specialist and lives up the road from me, has revealed the problem *might* be the relay.

So I actually got off my arse and pulled the relay off, seemingly I have to bridge two of the pins as this will see if the problem lies with the relay and will (hopefully) be enough to fire the car up.

 

So last time out...

 

And how it looks now...

 

So fingers crossed this 'fix' will work and if the relay is knack'd I don't mind buying a new one as far easier than replacing the fuel pump.

[Lord Sterling]

Good luck Cavette. Looks a nice'un that.

 

Mercs seemingly been standing in the garage as long as my G-reg Sterling. I really need to get myself sorted and get the gearbox fitted.

[HillmanImp]

That is a lovely looking car. Hopefully it will get it going.

 

I know exactly how it is. The Imp has been off the road 6 years with sporadic work, the Rocco has been sat there since April for no apparent reason other than I cant be arsed taking it for its MOT, not that it can be as its blocked in by the....GT6 which is mid weldathon. When you get them working though you just think why did I not do that sooner instead of sitting in the house drinking cider and watching the Sweeney?

[greengartside]

That's a lush looking motor love those rear lamps.

 

On the subject of knackered fuel pump relays, a similar thing happened to my 944, no go until I joined the three pins together then she fired up first time - was sat nearly 6 months! Well worth investigating.

[Cavcraft]

Thankyou folks.

 

My lad and I have had a look and removed the relay. Bridged the pins but confusing because the very helpful people on the 190E forum have said to bridge numbers 97 and 30. Unfortunately there are three or four 87 numbers and two 30s!

Also, it would seem, it's supposed to have two relays behind the battery where I only have one.

There is another relay in the fuse box (other side of engine bay) which has various numbers and only one '30' and one '87' so it could be that.

We bridged both relays (at seperate times) and also removed both relays to see if we could tell any difference when it tried to start. Not a jot so my son thinks the fuel relay is knackered as (hopefully) opposed to the fuel pump itself.

 

There's a German car specialist breakers the other side of town so if I can find out if the relays are all the same on all 190 models (1.8, 2.0, 2.0i, 2.3, 2.6 etc) I might have an avenue of help there.

[greengartside]

Would the OVP relay would have anything to do with it maybe? That has a fuse inside it I think (according to some owner's clubs on t'internet).

[meggersdog]

A relay is an electromagnetic switch.The smaller numbers 28-30 or just two 30's have current passed through them to energise the coil.The coil acts as a magnet pulling the switch down to connect the larger numbers 85-86 and 87.Bridging between the 30 and 87 won't work as they are seperate circuits.Joining the larger numbers together bypasses the relay.It gets complicated when there are three or more larger numbers.

The relay by the fusebox could be for foglights or anything else that takes alot of current.

[Pillock]

A "Standard" relay has a 30, 85, 86 and 87 I think. That's just a straightforward switch, low current side flicks the high current side. Bridging 30 to a battery or switched positive (which will be one of the high numbers) will flick the high current side on.

 

So yeah, although you're bridging the two sides of the relay, it'll have the desired effect. Basically you want 30 to go live to turn the main circuit on. You're misusing the relay because you're using the high current circuit to turn the high current circuit on, but it's only for testing.

 

You'll have to do this with the ignition on, as the live to the pumps will only be present then. It's not a permenant live.

[meggersdog]

erm yeah not sure of the numbers but if it's a standard four terminal block the 30 and it's opposing number will be much thiner wires.To test bridge between the two thicker wires with the ignition on if the pump buzzes into life it's the relay.

[Cavcraft]

Thanks. I'll post pictures of both relays when I get home from work tonight.

[garethj]

.To test bridge between the two thicker wires with the ignition on if the pump buzzes into life it's the relay.

Yep, unplug the relay and bridge the terminals in the fusebox with some thick wire

[Minimad5]

Seen this in the "flesh" , rather nice looking car.

Ever need a handy Billy, just throw me a txt .

Good luck

[Cavcraft]

Cheers.

 

Seemingly Mercedes had a habit of putting this relay in other places so the search will be on when I get chance, plus obv. refitting the ones I took off by mistake.

Currently enduring the month from hell at work so my mojo has wained slightly hence not getting off my arse in the week and having a look at it. The sensor, that is, not my arse.

[VWPowered]

i dont normally like 190's but that is lush

[ashmicro]

Billy, as you know I had a 190E, and still have the HBOL. It only shows the relays for'ard of the engine bay fusebox. There's a wiring diagram showing the fuel pump relay, showing its connections as 87, 30, TD, 15, 50 and 31.

 

I'll get the Mrs to scan it*, and I'll lob it up presently.

 

 

 

 

 

*I'm not allowed to touch the shiny new scanner thing, apparently.

[ashmicro]

Here we go:

 

 

If you need the see-it-from-the-moon size, PM me your email address and I'll send it as an attachment

[Cavcraft]

Nice one Ash, cheers for that.

It's suuposed to be to the left of (or behind) the battery but isn't there!

[Rusty Pelican]

Didnt know you had this hidden away , Always liked these , I fancy one in that primer grey colour they did , good luck with the resurection

[Cavcraft]

Just looked at the V5 to see how long I've owned it. Eight and a half years!

 

A bloke I know was selling his incredibly rough 2.0 dizzler one of these for two hundred sovs a year or ago, I bet he still has it. I might give him a bell as it could be a cheap runner for me to arse about in, though it'll be painfully slow.