Power trim not going back down

[Dino89]

My rib has been garaged for last 8 years , just gone to check it over would like to get it back in the water ,it's an Avon searider with Mercury 50 2 Stroke , connected the battery to raise motor all worked to lift it, went to lower it back down and it's dead no sound at all nothing at all ,dead as a dodo ...any ideas going back over to it tomorrow to have a look and get more details ,

[Ribtecer]

Sound like a power problem to me, hopefully a fuse.

If it went up then that a good sign.

My engines not been run for getting on for two years, that about to change.

[Dino89]

May of not been clear ,if I press up it still will try and go up even though it's fully up , just dead on down press so only dead on down motion

[Nasher]

There are a pair of relays that operate the trim pump from the trim buttons.

I'd suggest you get your multimeter out and start with checking there is power to and from them etc.

Nasher.

[Lee argyle]

Originally Posted by Nasher

There are a pair of relays that operate the trim pump from the trim buttons.

I'd suggest you get your multimeter out and start with checking there is power to and from them etc.

Nasher.

You could always swap the relays over, if you move the issue to not going up but will trim down you've proved one of the relays is faulty - quick fix.............

[Dino89]

Where are the relays 🤔 are they under the cowling or on the power trim thanks for the help

[beamishken]

If the motors running for up then that indicates something relatively simple as the same motor just reverses for down.
I'd start by checking the switch is feeding 12v to the down signal relay when its pressed if it is then I'd start checking the connections to the relay blocks take the connections off and clean them and the earths & refit. Likely culprits are- switch, electrical connections, relay or broken wire
In roughly that order of likelyhood
Relays are usualy on the powerhead inside the cowl
Get someone to click the up switch and listen for where the click comes from

[Dino89]

Thanks all for the replies got a good starting point and hopefully solve it thanks again��

[Dino89]

now i have finally completed the move to devon ,i can finally get back to this problem changed the wires over and it works the opposite way , so removed relays and changed them over then it started going up and down again before stopping in one direction again so swapped power leads again and it worked in both directions for a short while again so seems like possibly faulty sticky relay or connection tried to find this relay seimans vf4-35f11-z07 but nowhere to be found on google in uk any ideas of an oem or compatable one , would a contact grease help or electrical cleaner help or am i on the right track with faulty relay thanks

[spartacus]

Before condemning relays, check continuity on the wiring. Had a similar issue with my Tohatsu. Finally traced to oxidisation and break in wiring continuity. Manufacturers opted not to use tinned wiring, hence moisture ingress, copper turning green.

You can strip in new tinned wiring into the loom. A multimeter will confirm.

[Dino89]

I got meter with all usual settings on continuity volts etc ,at what points do you check ,not that good with electrics

[diver 1]

On my Suzuki the trim down became intermittent and I suspected the relays, however turned out to be the trim button on the side of the cowling had a bad connection and this was even affecting the trim on the controls at the helm. I repaired the switch and its been fine ever since.

[HDAV]

Originally Posted by spartacus

Before condemning relays, check continuity on the wiring. Had a similar issue with my Tohatsu. Finally traced to oxidisation and break in wiring continuity. Manufacturers opted not to use tinned wiring, hence moisture ingress, copper turning green.

You can strip in new tinned wiring into the loom. A multimeter will confirm.

Seen this before not sure why but trim wires seem to break often.....

[Dino89]

now the impeller is done got back to this , in short found the problem when it stops working if i press the back relay tighter in it works again , so it would appear its a contact issue tried contact cleaner but still the same intermittent working, is there anything i can apply that will help make contact ,like a contact paste or is it a case of new relay needed ?