Directed Electronics528T 12v Accessory Pulse Timer

I find the unit is very well designed and manufactured. It works well in both modes, negative and positive triggered.Like I have seen others state, I couldn't either find much information describing a clear functionality of these units. The tiny sheet that accompanies the unit gets the general idea across on how to connect it if you have sufficient experience with electronics or automotive alarm systems.Make certain to leave the blue jumper intact for negative (ground) trigger. Or. Make certain to cut the blue jumper for positive (DC Timer Module Supply Voltage) trigger.I was hoping to discover that once triggered, the module would hold off (pause) timing down if the trigger remained high or low (depending on configuration utilized positive or negative trigger) till the trigger state changed or if re-applied during timing, although it only detects a transition to initiate or re-initiate the timer if it isn't timing.Hopefully this operational description helps others seeking a timer for their particular application.

This is not a simple Bosch type relay. There are a variety of ways to wire it to accomplish a variety of tasks on vehicles, and the only real wiring options have to be found on blog sites. It seems to be a product for hobbyists and professionals, so it would be good to have some knowledge of electric circuitry. Aside from that, the set delay time is only repeatable if there is a significant time gap between input signals, on the order of a minute or more in my experience; otherwise the delay continuously shortens until it gets very erratic. So it may not be useful in applications that involve relatively short on/off flashing, like turn signals or some marine lights. It worked erratically with the signal coming from another solid state delay-generating circuit. It does seem to work fine on once-and-done applications like engine start and door entry/exit delays. It worked without malfunction on a car, encased in a dry box, as long as installed (several months).

I was looking around at various timers and reading the product reviews and selected this device. I've got to say it's a pretty slick little unit. Extremely compact. The instructions that accompany it are abysmal, however. It appears to be just an R-C controlled timer circuit, meaning I see no precision quartz timing components. The Brown, Orange and Yellow wires are the connections to the SPDT relay. The Red and Black are 12VDC. I have found that if you touch the Black/White wire to ground it will initiate the timer. The unit works just fine...right now I'm just experimenting with it. If I can figure out how to add an annotated copy of the instructions I will. If you are installing this unit in an area where there may be insects, I would put electrical tape of the hole for the potentiometer and caulk around the hole where the wires exit the case. Also, I would ALWAYS use an external relay to protect the timer relay.

Motorcycle-Perfect little delay timer for my Hayabusa HID low beam. I actually used this gadget with a HID direct relay harness from battery to 528T then to the HID ballast. After reading the reviews on Amazon and online, I drew my wiring on paper and it worked first time.For Non technical folks (since the directions does not even tell you what this thing is).....it takes about 20 mins.Do it at you own risk!!!!1. Orange wire=red/positive output2. Solid black = negative output. (look at "Note" on step 4 before you start this step).3. Yellow and Red (twist, tie, solder, tape together) are input positive>that means your power (red or +) are coming into 528T from the battery or power source.4. Part of "Solid black" and "white stripe black" wire are input=-negative from the battery or power source. (Trick: make that one solid black wire into "Y" wire.....twist one side of "Y" connector you just made to the white stripe black wire) Note: The other half of that "Y" solid black wire is going to above-step 2.Will not use: You will not use Brown wire (or at least it is not needed for the delay timer) and leave the Blue wire loop alone.After completion: Check all wiring to ensure its in heat/waterproof tubing (electrical tape works but get messy after couple of years) and secure. Fire it up......the dial for the timer on mine was set to the max and I thought it was not working....lol. I moved it counter clock wise for shorter time. Mine is set around 20+ seconds delay.Hope this helps!!! Enjoy.

I Rated 5 stars because once you understand how it works its awesome, mine included instructions but they were useless. I bought this to have a delay start on the radiator fans in a classic car i have so fans don't drain battery prior to start. I drew a picture to explain how I connected mine, in my case I am using the positive terminal from the ignition switch so that it only operates after I start the car. Battery in drawing is for illustration purposes only.I am using the orange wire for circuit to start open and then close after 45 seconds but you can use brown wire to start circuit closed and open after 45 seconds.

Poor quality unit. Defeats the purpose of a reliable car as most times they are used for anti-theft and remote start. Buy better. 2nd unit I purchased (same install). 1st lasted awhile then wouldn't stay latched. 2nd one was junk out of box. Potentiometer wouldn't adjust reliably and latching time was all over the place.