1991 Lwb pajero glowplug relay

[strada-caster]

Im talking on behave of my brothers vehicle since he left it with my dad to go away for school.
It started rough for my dad the other day, and I was over for thanks giving this weekend.

From what I can tell, the relays have just plumb stopped working. The click has vanished, and there is no voltage going to the glowplugs. They have not been replaced, and are 12V green tops. I had to hill-billy wire power to the plugs to get a nice start out of the truck.

Has anyone else just had the relays cut out?? Am I mising something else?
It seems to have 2 relays compared to my strada with just one. How could both die at teh same time?

Cheers

[lopar]

Check for control voltage at the relay(s), will be a smaller set of wires.......... if no voltage, then you probably have a bad sensor and or bad glow plug control unit....... needs to be replaced or just add a momentary switch for the control voltage and go manual! and it only costs the price of the switch....

[delicat]

To make it easier to start now just remove both wires going to the larger relay (solenoid) between the batteries and touch both wire for 3sec then go start your truck. If it starts fine your relay might be gone as per previous reply. The ECU can be rebuilt, ask Butch at CVI, he just did mine and only good things to say!

Good luck!
Mr. D

[strada-caster]

delicat, crossing a screw driver or anything metalic from relay post to post would accomplish the same would it not?

[delicat]

It should. I was thinking if you're going to remove it for repair or replacement then it's an easy way to get it started without the relay in place...

I would also check for some F150/F250 starter solenoid, wouldn't be surprised they'd fit... But CVI has the original ones and can also fix your for about $40 less than a new one.

Cheers,
Mr. D

[strada-caster]

new info...

battery at 12.5 volts, turn the key to on, and the relay clicks to 11 volts for about 1 second, then turns off. nothing after that. I tried to start and the starter sounds like the battery is dead.

I decide to jump start with my parents van. cables are connected and I hit the busbar with a wire attached to the positive terminal of the battery for a few seconds (multimeter reads no voltage at the bar, found that wierd) and the truck starts up no problem. for about 30 seconds after start up the second relay is clicking on (6V) for a few seconds and turning off for a few seconds. it did that 4 or 5 times.

ran for 5 mins, then shutdown and tried starting up again withing 30 seconds. started with no help no problem except the starter sounded half dead(started on first crank though).


my thoughts are:

-relays work fine
-glowplug ecu has some wierd timing issue for first 12V blast but works fine after start-up (I HATE ELECTRICAL). is the ecu the little tin rectangle next to the relays?
-starter is not getting the juice required to turn the engine (possible corroded wire or starter needs rebuilding).


anything that i'm missing?
CVI was mentioned earlier about an ECU rebuild, might give them a call.

[Raule Duke]

Sounds to me that the problem is your glow plug Temp sensor.

It is located just in font of your glow plugs. has a two wire plug attached

They cost $60 or $70 Call Paul At Pacific JDM, he'll have one in the mail for you in a day or two!!

Also your G.P. ECU is located at the passenger kick panel. It is a 6 or 7 inch square box with 2 white molex plugs from the bottom. Open the box up and visually inspect both sides of the board. check for any obvious burns or blemishes (corrosion etc) and also give it a smell for that "yep it's cooked" electrical smell.

[strada-caster]

I thought it could be the temp sensor but this morning has (maybe) proven me wrong.

got far enough to take out the battery and try a fully charged from my sisters jeep in place instead of jumping. Absolutely no difference with the starter (wants to turn but with no guts)[this shows me original battery is ok voltage and amperage wise). after putting the original battery back in, I tried again and something magical happened. the glowplug cycle seems to work again(5-7 seconds of 7 volts*SHOULD THIS BE 11VOLTS??**) when key is in the on position. But trying to start gets nowhere.

Now it is making me think everything with the glowplugs is ok. (except i haven't looked at the ecu, I'll do that a little later).

I think the problem lies in the starter. 3 diff trials with that so far
1- 12.5volts at battery, starter acts half dead and doesn't start the engine
2- jumpstart circuit hooked up, starter acts half dead and doesn't start the engine
3- battery under 12 volts, starter cannot turn. it just makes a tick tick noise making me think the gears are just banging back and forth and the starter doesn't have enough juice to turn the engine.

No corrosion on the wire and connection looks clean. how can I test the starter??, hopefully without taking it out of the vehicle.

Devin

[strada-caster]

problem solved.

that tick tick tick (really fast) was the solenoid kicking in and out over and over.

I branched the 2 posts on the solenoid with insulated pliers to run the starter motor and there was nothing. the motor has died.